This is only a small sample of my favorite metal bands.
Devildriver
The Haunted
Cradle of Filth
Soundgarden
Acumen Nation
Deftones
Megadeth and Metallica (first few albums)
Racer X
Slayer
Overkill
King Diamond / Mercyful Fate
Iron Maiden
Judas Priest
Black Sabbath
Suicidal...