i guess some, classical Beethoven, some type of Chinese/Japanese music. to feel at peace.
Marvin Gay, Al Green, Eagles, Barry White, and Luthur Vandross for the Ladies...
and his own Batman Theme from the first batman movie, the opening credits rhythm (from prince) when he's in a ass kicking mood.
and i agree with NOTHING..all of those guys he mentioned would likly listen to those..but no boy bands..not even Gordan's Daughter.