Mine are in no particular order but
Metallica
Ozzy Osbourne (Solo)
Black Sabbath
Heaven and Hell
Demons and Wizards
Iced Earth
Nightwish
Blind Guardian
Rob Zombie
White Zombie
The Black Mages
PowerQuest
Black Label Society
Shinedown
Godsmack
Lacuna Coil
Three Days Grace
Disturbed
The Sword
Dio
Judas Priest
Mastodon
Lincoln Park
Megadeth
Anthrax

Wow I didn't even know that I liked so many.