A note on Sixes - they are the most difficult to detail as they make up 50% of the worlds population, and so the sub-types are more prominent, but even more so the pushy/surrender dichotomy. However, they all share the same blueprint wiring and that is the fuel of the fixation: Doubt.

Sixes doubt everything! They doubt themselves and the world, even doubting whether they are Sixes once introduced to the Enneagram, rebelling against the idea that they are being categorized and boxed. They then become more aware of their pain, anger and sadness than that of fear, and they seek the hidden meaning behind what is apparent. They therefore doubt the obvious; outwardly appearing to agree with you while secretly doubting your motives.

Type Six in Brief from the Enneagram Institute: The committed, security-oriented type. Sixes are reliable, hard-working, responsible, and trustworthy. Excellent "troubleshooters," they foresee problems and foster cooperation, but can also become defensive, evasive, and anxious—running on stress while complaining about it. They can be cautious and indecisive, but also reactive, defiant and rebellious. They typically have problems with self-doubt and suspicion. At their Best: internally stable and self-reliant, courageously championing themselves and others.

Basic Fear: To be without support and guidance
Basic Desire: To have security and support
Enneagram Six with a Five-Wing: "The Defender"
Enneagram Six with a Seven-Wing: "The Buddy"

Key Motivations: Want to have security, to feel supported by others, to have certitude and reassurance, to test the attitudes of others toward them, to fight against anxiety and insecurity.

The Meaning of the Arrows (in brief)
When moving in their Direction of Disintegration (stress), dutiful Sixes suddenly become competitive and arrogant at Three. However, when moving in their Direction of Integration (growth), fearful, pessimistic Sixes become more relaxed and optimistic, like healthy Nine.

Type Six Overview

We have named personality type Six "The Loyalist" because, of all the personality types, Sixes are the most loyal to their friends and to their beliefs. They will “go down with the ship” and hang on to relationships of all kinds far longer than most other types. Sixes are also loyal to ideas, systems, and beliefs—even to the belief that all ideas or authorities should be questioned or defied. Indeed, not all Sixes go along with the “status quo”: their beliefs may be rebellious and anti-authoritarian, even revolutionary. In any case, they will typically fight for their beliefs more fiercely than they will fight for themselves, and they will defend their community or family more tenaciously than they will defend themselves.

The reason Sixes are so loyal to others is that they do not want to be abandoned and left without support—their Basic Fear. Thus, the central issue for type Six is a failure of self-confidence. Sixes come to believe that they do not possess the internal resources to handle life’s challenges and vagaries alone, and so increasingly rely on structures, allies, beliefs, and supports outside themselves for guidance to survive. If suitable structures do not exist, they will help create and maintain them.

Sixes are the primary type in the Thinking Centre, meaning that they have the most trouble contacting their own inner guidance. As a result, they do not have confidence in their own minds and judgments.
This does not mean that they do not think. On the contrary, they think—and worry—a lot! They also tend to fear making important decisions, although at the same time, they resist having anyone else make decisions for them. They want to avoid being controlled, but are also afraid of taking responsibility in a way that might put them “in the line of fire.” (The old Japanese adage that says, “The blade of grass that grows too high gets chopped off” relates to this idea.)

Sixes are always aware of their anxieties and are always looking for ways to construct “social security” bulwarks against them. If Sixes feel that they have sufficient back up, they can move forward with some degree of confidence. But if that crumbles, they become anxious and self-doubting, reawakening their Basic Fear. (“I’m on my own! What am I going to do now?”) A good question for Sixes might therefore be: “When will I know that I have enough security?” Or, to get right to the heart of it, “What is security?” Without Essential inner guidance and the deep sense of support that it brings, Sixes are constantly struggling to find firm ground.

Sixes attempt to build a network of trust over a background of unsteadiness and fear. They are often filled with a nameless anxiety and then try to find or create reasons why. Wanting to feel that there is something solid and clear-cut in their lives, they can become attached to explanations or positions that seem to explain their situation. Because “belief” (trust, faith, convictions, positions) is difficult for Sixes to achieve, and because it is so important to their sense of stability, once they establish a trustworthy belief, they do not easily question it, nor do they want others to do so. The same is true for individuals in a Six’s life: once Sixes feel they can trust someone, they go to great lengths to maintain connections with the person who acts as a sounding board, a mentor, or a regulator for the Six’s emotional reactions and behaviour. They therefore do everything in their power to keep their affiliations going. (“If I don’t trust myself, then I have to find something in this world I can trust.”)

Although intelligent and accomplished, Connie still has to wrestle with the self-doubt of her type:

"As my anxiety has come under control, so has my need to ‘check out’ everything with my friends. I used to have to get the nod of approval from several hundred (just joking!) ‘authorities.’ About nearly every decision would involve a council of my friends. I usually would do this one on one: ‘What do you think, Mary?’ ‘If I do this, then that might happen.’ Please make up my mind for me!’…Recently, I’ve narrowed my authorities to just one or two trusted friends, and on occasion, I’ve actually made up my own mind!“

Until they can get in touch with their own inner guidance, Sixes are like a ping-pong ball that is constantly shuttling back and forth between whatever influence is hitting the hardest in any given moment. Because of this reactivity, no matter what we say about Sixes, the opposite is often also as true. They are both strong and weak, fearful and courageous, trusting and distrusting, defenders and provokers, sweet and sour, aggressive and passive, bullies and weaklings, on the defensive and on the offensive, thinkers and doers, group people and soloists, believers and doubters, cooperative and obstructionist, tender and mean, generous and petty—and on and on. It is the contradictory picture that is the characteristic “fingerprint” of Sixes, the fact that they are a bundle of opposites.

The biggest problem for Sixes is that they try to build safety in the environment without resolving their own emotional insecurities. When they learn to face their anxieties, however, Sixes understand that although the world is always changing and is, by nature uncertain, they can be serene and courageous in any circumstance. And they can attain the greatest gift of all, a sense of peace with themselves despite the uncertainties of life. (from The Wisdom of the Enneagram, p. 235-236)

Examples: Krishnamurti, Johannes Brahms, Mark Twain, Sigmund Freud, J. Edgar Hoover, Richard Nixon, Robert F. Kennedy, Malcolm X, George H.W. Bush, Diana, Princess of Wales, Prince Harry, J.R.R. Tolkien, John Grisham, Mike Tyson, Bruce Springsteen, U2’s Bono, Melissa Etheridge, Eminem, Oliver Stone, Michael Moore, Spike Lee, Marilyn Monroe, Robert De Niro, Dustin Hoffman, Mark Wahlberg, Woody Allen, Diane Keaton, Mel Gibson, Sally Field, Tom Hanks, Meg Ryan, Julia Roberts, Jennifer Aniston, Ellen Page, Paul Rudd, Sarah Jessica Parker, Ben Affleck, Hugh Laurie, Katie Holmes, David Letterman, Jay Leno, Ellen Degeneres, Andy Rooney, Katie Couric, Newt Gingrich, Alex Jones (Infowars), Rush Limbaugh, Chris Rock, Lewis Black, Larry David, Seinfeld’s “George Costanza,” Lord of the Rings’ “Frodo Baggins” from the Enneagram Institute

The Enneagram Institute: Type Six—Levels of Development

Healthy Levels

Level 1 (At Their Best): Become self-affirming, trusting of self and others, independent yet symbiotically interdependent and cooperative as an equal. Belief in self leads to true courage, positive thinking, leadership, and rich self-expression.

Level 2: Able to elicit strong emotional responses from others: very appealing, endearing, lovable, affectionate. Trust important: bonding with others, forming permanent relationships and alliances.

Level 3: Dedicated to individuals and movements in which they deeply believe. Community builders: responsible, reliable, trustworthy. Hard-working and persevering, sacrificing for others, they create stability and security in their world, bringing a cooperative spirit.

Average Levels

Level 4: Start investing their time and energy into whatever they believe will be safe and stable. Organising and structuring, they look to alliances and authorities for security and continuity. Constantly vigilant, anticipating problems.

Level 5: To resist having more demands made on them, they react against others passive-aggressively. Become evasive, indecisive, cautious, procrastinating, and ambivalent. Are highly reactive, anxious, and negative, giving contradictory, "mixed signals." Internal confusion makes them react unpredictably.

Level 6: To compensate for insecurities, they become sarcastic and belligerent, blaming others for their problems, taking a tough stance toward "outsiders." Highly reactive and defensive, dividing people into friends and enemies, while looking for threats to their own security. Authoritarian while fearful of authority, highly suspicious, yet, conspiratorial, and fear-instilling to silence their own fears.

Unhealthy Levels

Level 7: Fearing that they have ruined their security, they become panicky, volatile, and self-disparaging with acute inferiority feelings. Seeing themselves as defenceless, they seek out a stronger authority or belief to resolve all problems. Highly divisive, disparaging and berating others

Level 8: Feeling persecuted, that others are "out to get them," they lash-out and act irrationally, bringing about what they fear. Fanaticism, violence.

Level 9: Hysterical, and seeking to escape punishment, they become self-destructive and suicidal. Alcoholism, drug overdoses, "skid row," self-abasing behaviour. Generally corresponds to the Passive-Aggressive and Paranoid personality disorders.

Addictions

Rigidity in diet causes nutritional imbalances ("I don't like vegetables"). Working excessively. Caffeine and amphetamines for stamina, but also alcohol and depressants to deaden anxiety. Higher susceptibility to alcoholism than many types.

Personal Growth Recommendations for Enneagram Type Sixes

Remember that there is nothing unusual about being anxious since everyone is anxious and much more often than you might think. Learn to be more present to your anxiety, to explore it, and to come to terms with it. Work creatively with your tensions without turning to excessive amounts of alcohol (or other drugs) to allay them. In fact, if you are present and breathing fully, anxiety can be energising, a kind of tonic that can help make you more productive and aware of what you are doing.

You tend to get edgy and testy when you are upset or angry, and can even turn on others and blame them for things you have done or brought on yourself. Be aware of your pessimism: it causes you dark moods and negative thought patterns that you tend to project on reality. When you succumb to this self-doubt, you can become your own worst enemy and may harm yourself more than anyone else does.

Sixes tend to overreact when they are under stress and feeling anxious. Learn to identify what makes you overreact. Also realise that almost none of the things you have feared so much has actually come true. Even if things are as bad as you think, your fearful thoughts weaken you and your ability to change things for the better. You cannot always mange external events, but you can manage your own thoughts.

Work on becoming more trusting. There are doubtless several people in your life you can turn to who care about you and who are trustworthy. If not, go out of your way to find someone trustworthy, and allow yourself to get close to that person. This will mean risking rejection and stirring up some of your deepest fears, but the risk is worth taking. You have a gift for getting people to like you, but you are unsure of yourself and may be afraid of making a commitment to them. Therefore, come down clearly on one side or the other of the fence in your relationships. Let people know how you feel about them.

Others probably think better of you than you realize, and few people are really out to get you. In fact, your fears tell you more about your attitudes toward others than they indicate about others' attitudes toward you.

Enneagram Institute