Mostly trance and the more chart oriented drum and bass (Rudimental, DJ Fresh are examples of what I mean with that description) and then some early 80's electronica. Mostly depends on my mood and surroundings... I find that sometimes classical is best, but in the office sometimes I just play rain and thunder storms... the noise drowns out the background chatter.

In essence though, it all depends on my mood, surroundings and what I'm trying to do, but it is a very eclectic mix