Just like most other times in my life, Beatles music is always nice. Although a lot of the times I'm playing poker, I'm around klinkman, who is usually also playing, sometimes in a different game, sometimes not, but usually then we're talking either about the games or something else so I may not have music going. Plus sometimes the sounds are helpful in the poker clients so I don't want to be distracted by other sounds. But generally I'd say Beatles, Coldplay is good too. Anything with a driving rhythm to it.