Day-to-day human psychology. I'm nowhere near the level of a professional psychologist, but I enjoy picking the human mind apart to see what makes it tick and it works the way it does, as well as how to make it work better - some people's minds are thoroughly broken, and I speak from experience. Perhaps such an interest of mine is me looking for a cure for something I got from my parents and a defence mechanism against further such contaminations, as well.

I've already expressed a couple of my findings in another one of your posts, Exi. Basically, human beings do a lot of things to avoid something they're afraid of (barring objectively-undesirable outcomes like death or injury): shame or guilt, humiliation, feeling stupid, making a mistake, encountering a danger (meaning leaving comfort) etc. It's why we procrastinate: we lie to ourselves that the reason something's not done yet is because we can always do it "someday, when the time is right", or "when I have the money/connections/popularity/time", and not because we're afraid to face a fear of ours. Without a fear to accompany an action, there's nothing to prevent us from doing it: we buy bread and veggies with no fear and, therefore, no complications because we don't associate this action with any sort of fear.

Yet, most things that are worth doing are usually things people are capable of doing but are afraid to do. Climbing a mountain is fucking hard, and it takes a lot of practice, and you might even die from it - but ask around those who have climbed about whether they regret the experience, and I doubt you'll ever get a positive response. To be happy, people have to challenge themselves - this is how we develop: in skills, in personality, in our wishes, in our worldview etc. But it's hard, and quite a few people don't go for it when they have all the comforts around them already. A challenge gives humans the feeling of control over their lives which so many of us crave for without knowing; even if failed, at least you understand you've tried, that you can, you're capable.

Then, there are issues of overdeveloped/underdamaged egos, comfort versus challenge (as touched briefly above), materialism versus spiritualism (and why travels are a better investment than a new sofa) and a few more topics I feel like I'm quite well-versed on, compared to an average person. All of what I know comes from personal discoveries (living in a dysfunctional family, being a recluse and an outcast most of my life and othersuch) as well as reading up on things or hearing other, wiser people talking about those. As a child, I used to believe in the more occult, paranormal ideas because they provided me with the necessary closure about the world in the same way religion provides such closure for those believing, and while much of those ideas are bullshit, some truth in there remains, and it's too bad the diamonds get overlooked along with the mud, though I can't blame people for it.

All of which is to say that I conclude: anyone can achieve the same level of proficiency with understanding how one's life works, given few enough barriers are placed on a person by themselves and/or their surroundings. One has to be tirelessly curious about the world, willing to ask questions beyond the borders of social contracts - of oneself and of others - and don't buy into the crap one's mind could feed them (like self-induced low self-esteem due to incredibly high standards). All of it takes practice, time and a certain income of information, like reading books or using the Internet to research topics, but it's doable. It's not a matter of belief, either: things are doable if you put effort into it through a reasonable sequence of actions; one's responsibility before oneself is to learn which is a reasonable sequence and which is not.