I think that most people, including rationalists, have significant psychological problems that interfere with their happiness in life and impair their rationality and their pursuit of rationality. What we think of as normal is very dysfunctional, and it is dysfunctional in many more ways than just being irrational and subject to cognitive biases.
I think furthermore that before devoting yourself to rationality at the near exclusion of other types of self-improvement, you should devote some serious effort to overcoming the more mundane psychological problems such as being overly attached to material trinkets and measuring your self-worth in material terms, being unaware of your emotions and unable to express your emotions clearly and honestly, having persistent family and relationship problems, having chronic psychosomatic ailments, etc. Without attending to these sorts of issues first (or at the same time), trying to become a rationalist jedi is like trying to get a bodybuilder physique before you've fixed your diet and lost the 200 extra pounds you have.
I think the notion the 'most people suffer from significant problem X' is very often plain misunderstood. If everybody 'suffers' X, X is the norm, not an affliction (with exceptions such as, say, lower back pain). You're projecting your normative values onto factual matters.
Also, the notion that we have deficient moral/mental capacities seems to me unsupported and basically quasi-religious. "What we think of as normal is very dysfunctional..." Red pill or blue pill. Please.
Our attachment to material trinkets, material self-worth, emotion exp...
What do you believe that most people on this site don't?
I'm especially looking for things that you wouldn't even mention if someone wasn't explicitly asking for them. Stuff you're not even comfortable writing under your own name. Making a one-shot account here is very easy, go ahead and do that if you don't want to tarnish your image.
I think a big problem with a "community" dedicated to being less wrong is that it will make people more concerned about APPEARING less wrong. The biggest part of my intellectual journey so far has been the acquisition of new and startling knowledge, and that knowledge doesn't seem likely to turn up here in the conditions that currently exist.
So please, tell me the crazy things you're otherwise afraid to say. I want to know them, because they might be true.