1. Metallica - the first decade in particular
2. Led Zeppelin - I'm currently jamming to the Song Remains the Same and am addicted to the version of No Quarter
3. Black Sabbath - I've blown many a car speaker listening to Sabbath
4. Iron Maiden - Live After Death is a must have
5. The Doors - Show me the way to the next whiskey bar...
Other bands/performers, in no particular order - Pink Floyd, Blue Oyster Cult, Alice in Chains, Soundgarden, Hendrix, Tool.