For me, it's heavy metal & death metal. Nothing like getting into the mood for doing some work when you're being screamed at.
Oo huge headache.. lol i like something with movement..A beat that goes up than down with huge bass.. <3 Bass
Beethoven, Chopin and Vivaldi mostly, although recently I've been getting a bit sentimental and have started listening to the music of my youth: JUNGLE!
I listen to just about everything, jazz, blues, hiphop, rock, though when I'm designing webpages I tend to listen to a lot of electronic music or dub reggae. Something instrumental with a slow groove, so my head nods away whilst I'm typing code and I go into a sort of trance basically. http://www.last.fm/user/BriongloidMedia/ - if anyone wants to add me.
Aol may suck for everything else, but they have the best online radio. I like the psychedelic station under rock. Right now they are playing "Not Fade Away" by The Grateful dead.
Usually I'm listening to relaxing music...like Cafe del Mar and Budha Bar collections These are amazingly good for chilling