In college I listened to music all the time when I worked on creative things. Problem was someone presented a paper on musical influences and art and ever since then I have quit listening to music when I am creating personal things. It may sound weird but I noticed a trend with my own work and how different music affects me. I am FAR from being an artsy farsty type of guy but I believe that a lot of true creativity comes from inside you. And when I listen to music it can change my mood and my thinking process. On the other side, when I do work for clients (more so with video type stuff) I always ask for musical influences and try to listen to that type of music when I do the projects. When I do listen to music I like groups like prodigy, fluke, fatboy slim etc....I find electronic music rather fascinating.