I think I have a lot less than I thought I did, simply because the non-metal stuff I listen to is more scattered and sporadic, and I don't have any real loyalties. My list would mostly consist of punk stuff like the Dead Kennedys and the Misfits, with some random crap like Aphex Twin, Johnny Cash, Jimi Hendrix, A Perfect Circle, and the classical greats like Mozart, Bach, Beethoven... I really really really like Sibelius, too. And Wagner is fun, of course.
I'm probably forgetting some...