I don't generally listen to music while I work unless I need to drown out something else. It slows me way down because I pay too much attention to it. Plus when I've got my headphones on, sometimes I start singing or whistling without realizing it, and that just annoys everyone else in the room.

In terms of other workspace requirements, I need a visual field that is relatively low contrast. If there's a bright light somewhere beyond my monitor I have trouble with my eyes and headaches.