Actually, I really enjoyed studying complexity theory. It just took far more effort than anything I've ever done before - it's really mind bending, and that's why I loved it. I just know that to get to the real meat, I'd have to work very hard for five years or so to develop the intuition and to get up to speed, and even then I'm not sure if I'd be able to cut it to do real first-rate work (a cop-out, I know).

I agree with you that people, especially laymen, tend to overrate talent - it's a good defense strategy that helps people avoid doing difficult things. But I disagree with you that there is no natural talent or inclination towards certain subjects in general. When it comes to hard math, I know people that just pick it much quicker and easier than I do, and it has been the case since I was very young (long story short, for a few years I went to school for gifted children, and some kids were just better than me no matter how hard I worked). I'm also convinced that some fields require more natural talent than others.