Everything. Well, with the odd exception...
I like (to save a huge list of bands)...:
Rock, Pop, (some) Rap, anything with J in the genre (J-Rock, J-Pop etc), punk, classical, emo, 'goth', dance (most sub-genres - trance, hardcore, euro, acid etc), indie, jazz...
...I can't list all the genres, but just about the only thing I really don't like is avant garde... urgh...