Well I like a lot of alternative/indie rock, if you can really consider that rock, and any kind of techno, really. I pretty much like anything I can chill out to. I can't listen to too much metal or screamo types, though, because that's like scraping my brain out with a fork or something. Blah.
But as I said, my tastes are rather varied, so as long as it's music, I'll probably find some way to enjoy it at least a little bit.
Currently I've been listening to Nickel Creek, Jonathan Coulton, Brandi Carlile, DJ Hype, and of course Cypress Hill, because their music is always hilarious to me.