I pretty much like any music that is well executed and has some thought behind it. Which is why I usually can't stand for popular music, as most of it is made for making cash, not expressing an idea. And it's a very limited portion of the music world.
As to preference I'm kind of a split between upbeat, energetic tunes (electro-swing, Architecture in Helsinki, Hungry Kids of Hungary)
and darker more intense stuff. (Daughter, Cameras, Winter People, The Yeah Yeah Yeahs, Radio Head)
I dunno, it kind of depends on my mood I guess.