I was jumping all over the place on my Sirius (70s, 80s, New Wave, 80s Rock, etc. etc.), but now I'm honing back in on just straight hard rock, mainly new stuff. Disturbed, Shinedown, Audioslave, those type of things.
Actually, I and a friend of mine have been doing little "jam sessions" at his place. I do the singing and he is the guitarmeister. It's pretty fun...we need to learn some more new songs though.
Our version of "Rooster" by Alice In Chains is pretty kickass.