Some of my favorites in alphabetic order:

Alarum
Apocalyptica
Arch Enemy
Barathrum
Behemoth
Berzerker
Blotted Science
Candiria
Cannibal Corpse
Cavalera Conspiracy
Cephalectomy
Cephalic Carnage
Chimaira
Coal Chamber
Cynic
Deftones
Dimmu Borgir
Disturbed
Dying Fetus
Dysrhythmia
Eardelete
Empyrium
Enslavement of beauty
Ephel Duath
Essence of Sorrow
Fear Factory
God Forbid
Gorerotted
Hatebreed
Hypocrisy
Immortal
Impaled Nazarene
In Flames
Iron Maiden
Kataklysm
Lamb of God
Liquid Tension Experiment
Meshuggah
Moonspell
Mudvayne
Opeth
Rammstein
Rigid Horns
Sakkuth
Septic Flesh
Sepultura
Six feet Under
Soulfly
Sun of the Sleepless
Sybreed
System of a Down
Timecry
Torsofuck
Unearth
Unearthed Corpse
Unexpect

Bullet For My Valentine, and A Day To Remember

Pantera, Metallica, S.O.A.D., Five Finger Death Punch, Meshuggah, Sepultura, Iron Maiden, Buckethead, Ozzy Osbourne, Black Sabbath, Steve Vai (arguably metal), Michael Angelo Batio, Yngwie Malmsteen (Yes, I'm a big fan of shredding), among shitloads of others.

Godsmack and P.O.D, naturally.

I have only seen one person say Opeth

Well I say

Opeth
Necrophagist
The Faceless.

Turisas, Alestorm, Dark moor, Dreamtale and Stratovarius I would say.

Edit: Second thought, I choose Edguy...

Satanic Warmaster
Judas Iscariot
Carcass
Arafel
Azaghal
Carpathian Forest
Death
Deadbird
Darkthrone
Satyricon
Edge of Sanity
Ghoul
Deicide
Godkiller
Demolition Hammer
Mayhem
Morbid Angel
Cattle Decapitation
Funeral Rape
Necrocest
Moonblood
Necropsy
Nunslaughter
Sarcofago
Sodom
Sinister
Tankard
Torturium
Wraith
Xasthur
Thyrane
Thornspawn
Obituary
Marduk
Kult of Azazel
Fuck... I'm Dead
Exhumed
Enslaved
Burzum
Bloodstone
Bathory
Beherit
Blood Feast
Gloom
General Surgery
Nokturnal Mortum
Zyklon-B
Vomitory
Fluisterwoud

Yeah, metal, gothic, industrial and dark ambient are all i listen to.
Slipknot, System of a Down, Hatebreed and Godsmack are all not metal.. Nu-metal, metalcore and deathcore.. all mainstream too except for hatebreed.

Linkin effin' Park is Nu-metal. Godsmack is alt rock, but I guess you got me there.

death, susperia even if it was just for theyr super tasty riffs and of cource metellica
just check them on youtube.
oh and bert and ernie ------------> http://www.youtube.com/watch?v=InZNB...eature=related (hey humor is important to ^^)

I thought this was supposed to be about metal bands.