Personally, I usually listen to...well, not really any specific genre of music. Not sure what it's considered actually...it's the kind of music you'd hear in movie trailers, orchestral, things like that...it's also really good for that.
Although, due to the time of year it is now - I'm actually listening to Christmas songs right now, because why not? xD Honestly, for me, the music is to drown out all other sounds, not to put me in any specific mood. I have an easier time ignoring music than the sounds it drowns out.
Edit: I just realized how off topic this is going. xD I'm going to stop posting in this thread now.