Same thing here. I listen to music I listened to when I first started spending 6+ hours after school coding. It's not what you'd guess. I know the music so well it puts me into a comfort zone that always allows me to just get shit done. Brain hacking at it's best.

Bonobo radio on Spotify is a great starting point for laid back EDM that isn't anxiety-inducing but keeps energy up.

I love all forms of jazz too much to listen to it while I work, because I start listening critically and getting into musician mode not coder mode.