Music to code by?

Ok, with the advent of digital music players a great deal has been said about listening to music at work. However, nobody has ever mention what music goes with which activity. An example of this would be that I listen to either Pink Floyd or The Grateful Dead when coding XSLT. JavaScript, however, goes better with Jethro Tull, but C# requires Led Zepplin or Blue Oyster Cult.

What music do you listen to?