My pet hates.
Obvious stuff. Homophobia, racism, sexism, bigotry in general.
Generally, people behaving unpleasantly to other people, particularly violence. There's no excuse for it, really.
The fact that there are people who justify rape.
Bad driving (although Sarah would probably say I'm as guilty of that as anyone else).
Apart from that, there's probably not much that I really hate. Despite my depression, I try to maintain a fairly positive outlook on life, and hate doesn't really go well with that.