bands like Bon Iver, Ray Lamontage, Amos Lee etc... is all I listen to when I train. I like to be relaxed and composed when I train. Metal just sounds like noise to me.
i really like stuff that flows when i train. I listen to a lot of andre nickatina, atmosphere, kid cudi, wiz khalifa. But most of the time we listen to punk.
Since I'm in FL most of what gets played is either rap/hip-hop, reggae or ska-influenced bands, or latin music. Personally, I would rather listen to metal, the heavier the better. My tastes line up pretty well with the kind of stuff Josh Barnett listens to.
Unkle, Champion, These new Puritans, A Perfect Circle, Tool, Nujabes, Moby. The relaxing 'cool' vibe stuff. Heavy cords and the like were when I trained wrestling. Kinda wanna go for a different vibe when you stretch and train Jiu Jitsu. ;P