well i'll try to help here
Thrash metal (old metallica, slayer, Terror 2000, Testament,Holochaust)
Power Metal (Metalium, Stratovarius, Blind Guardian)
Black Metal (Immortal, Emperor, Satyricon, Mayhem, Darkthrone)
Death Metal (The Crown, Soilwork, Death, *Darkane (Death/thrash with prog and classical influences)
brutal death (Nile, Devourment, Disgorge)
Prog Metal (Dream Theater, Candiria)
Neo-classical/prog metal (Symphony X)
Gore/death Metal (Cannibal Corpse)
Doom Metal (Electric Wizard (doom stoner metal if i'm not mistaken), My Dying Bride, Therion
well that's all i can remember for now.
*note* i could be wrong on something so don't flame me