For bodywork, I pick the music, since I have to "work" to it. No Enya (bleah!), and nothing one would ever hear on the radio.
I once allowed a client to play his own selection he brought with him... and that lasted 15 minutes. It was experimental jazz. Cannot. Massage. To. Scat!
My current fave is a piece called "Serenity" by Liquid Mind. No vocals, and while it's electronic, it definitely puts me in the theta brain wave state, into a place of just pure Be-ing, without falling asleep, but incredibly restful.
I have synaesthesia, so music is a super big dealio to me