I like a really wide variety of stuff, but lately I've been listening to a lot of modern garage rock (Strokes, White Stripes, Libertines, Arctic Monkeys, Black Keys...) and 80s and 90s alt music (R.E.M., Pixies, Sonic Youth, Talking Heads, Nirvana, Pearl Jam). I've been on kind of a Bob Dylan kick to boot.
Again, though, I can enjoy most anything if it's good. Classic rock, electronica, bluegrass, soul, punk (some... still a genre I'm getting into. 70s and early 80s stuff I find loads better than, say, Sublime or the Offspring)... all of that finds some kind of space in my Pandora playlist, normally. Just any kind of good, relatively spare rock music (I'm usually not a fan of really overdone/loud production) is probably always what I'll like best, though.
Oh, and the Beatles. I could listen to the Beatles forever.
Also, for my own two cents on the whole conversation from earlier about modern pop and rap music, it's not so much the music that bothers me sometimes (though that is the case a lot of the time
), but rather that almost everything is just manufactured by producers and A&R guys to be popular instead of actually crafted and recorded by someone who cares about what they're doing for music's sake. Pop music just sounds totally soulless to me a lot of the time.