Pretty much anything goes. I especially like the good old heavy metal bands like: Judas Priest, Iron Maiden, led Zeppelin, etc.
My favorite rock music is the songs of Metallica and Pearl Jam. But I also consider some types of the songs of other bands like Creed, Seether, Linkin Park, Korn, Limpbizkit, Evanescence and a lot more.
I'm keen to listening to Little Richard as well as the old Elvis songs. I really think they have a lot of soul into them, if you know what I mean.