Let me have a first go at it. Before tennis, like all avid tennis dudes, I listen to a lot of metallica, pearl jam, guns n' roses. Other rock bands that get me excited. I find that I play a lot better after I get pumped up listening to some good stuff. If I listen to classical stuff which I also happen to appreciate immensely, I just don't play as well; it's as though my mind is in the sky while I am hitting the ball.