There is very little I don't like, and even less I can't sing along to. I like opera, operetta, foreign language stuff, country... I enjoy singing folk/trad most, and that is what is mostly in my car, since I like to sing there, but really the only things I don't like are (most) rap and (most) modern jazz... Oh, and I don't really like non-Western (in the sense of the tonal scale) music very much, but I think that is a lack of familiarity thing. I hear a lot of rap and modern jazz and I really don't like it. Most of it, I hedge.