Evil Dead
Hail to the King baby
Faith No More..when I heard the song "Surprise You're Dead". That really pushed me over the edge of being a sabbath/metallica fan to harder shit. I never really appreciated brutal death metal until I got older though.
Pantera, Fear Factory, Strapping Young Lad and in that order, it would progressively get heavier and branch into multiple directions and genres.
Bad ass. I wish I had the Deicide I had first still.
I wonder what my tastes would be like had I heard Carcass first instead.