I like topology, differential topology, set theory, differential geometry. But I ask myself why, and I can't give a good answer. I know that I like abstraction and proofs, but yet I don't like group theory and ring theory, which are quite abstract and deals mainly with proofs. Perhaps I like dealing with derivatives, and hence my preference for differential topology and differential geometry. But yet I don't like differential equations or plain calculus. Do we like something just because we are good at it? Not in my case. I got my highest grade in group theory, ring theory, and number theory, all of which I don't like. Perhaps it's a genetic thing? I don't think so. So what is it then? And why don't I like group theory and ring theory? I don't know. Can someone explain why you have chosen your math field?