Day 19 - What music enhances your game?
Urggh... Tough one for me to answer.
While I listen to music that suits the mood of the game that I'm writing a scenario or other material for, I don't tend to have music in the background, even at low volume, when I'm running the game as it tends to distract from the game itself (and this is something that my players have said they're appreciative of). That said, I will have some music appropriate to the game playing in the background as the players arrive for the gaming session and while we set up for the game play.
As a last thought, the music that enhances the game(s) for me tends to be music appropriate to the genre. As I read the game I'm currently working through, I've been listening to some very good traditional and more modern Middle Eastern music. Lovely stuff! :)