Classic Rock, Bluegrass, Disco, Counrty for the most part.
Styx, Huey Lewis and the News, Rascal Flatts, The Charlie Daniels Band, Bananarama, Suppertramp, Jefferson Starship, REO Speedwagon.... If they're from the 70's or 80's for the most part, they're included on my list.
I almost forgot.
Game Music and Movie Music. Best soundtracks ever
Trance sitar, anything with bagpipes or the noseflute... and recordings of random screams and scraping (metal on metal). I used to go to bed listening to humpback whales, but then started having disturbing dreams. I found out later the whales were singing mating songs to each other.
I listen to a lot of Dax Riggs stuff... Acid Bath, Agents of Oblivion, Deadboy and the Elephant Men. Gwar, Pantera, and Slayer are always good. Dead Kennedies, Ramones, and Sex Pistols, also Eyehategod and Despise You, Napalm Death, Cannibal Corpse... Weedeater, Bongzilla. Dropkick Murphys and Operation Ivy... also some rap, classical, old OLD country and ... well... lots of stuff...