I listen to lots of metal... mostly symphonic stuff, but I like extreme just as good
sonata arctica
kamelot
iced earth
finntroll
mago de oz (they're not that great, but fun)
apocalyptica
dying fetus
cannibal corpse
arch enemy
morbid angel
iron maiden
metallica
slayer
testament
Lamb of god
rhapsody
rotting christ
sepultura
soulfly
epica
opeth
elvenking
and of course stuff that isn't really metal but close to it: SOAD, rammstein, kittie, in flames,...