In no particular order:
Classic Rock (Doors, Rolling Stones, Black Sabbath, etc.)
Southern Rock (Lynyrd Skynyrd, Allman Brothers, etc.)
Death/Black Metal (Cannibal Corpse, Deicide, Six Feet Under, etc.)
Old School Hardcore Rap only (Wu Tang Clan)
1950's Rock 'n Roll
1950's Doo Wop...