Welcome to Gaia! ::

Well i think Reign in blood is great too! I was gonna name it but u got to it
first! xd
BTW They need to add the Metalcore section too! I could add a few!

Anyways here are mine.

Thrash Metal
Slayer - Live Decade of Aggression*
Slayer - Divine Intervention
Slayer - South of Heaven
Slayer - Seasons in the Abyss
Pantera - Vulgar Display of Power
Pantera - Cowboys from Hell
Sepultura - Chaos A.D.
Venom - Black Metal
Venom - Cast in Stone
Exodus - Bonded By Blood
Exodus - Another Lesson in Violence
Destruction - Sentence of Death
Destruction - All Hell Breaks Loose
At the Gates - Slaughter Of The Soul

Death Metal
Cannibal Corpse - Bloodthirst
Cannibal Corpse - Live Cannibalism
Nile - Amongst The Catacombs Of Nephren-Ka
Nile - Black Seeds of Vengeance
Krisiun - Conquerors of Armageddon
Deicide - Serpents Of The Light
Deicide - Deicide
Vital Remains - Dechristianize

Grind
Pig Destroyer - Terrifyer

Well, I'm not adding a Metalcore section for one reason. Metalcore is a cross between Hardcore and Metal. The bands that fall in Metalcore could just be Hardcore with Metal influences..Therefore, not metal.

Thrash:
Trivium- The Crusade, Ascendancy.

Both are amazing works of the resurrectors of Thrash.

And what about Powergroove?
Pantera: Vulgar Display of Power, Cowboys from Hell
Lamb of God: Ashes of the Wake, Sacrement, Burn the Priest

Powergroove is like metal with a good rythm, very melodic guitars and beats.

Trivium =/= Thrash. Trivium is metalcore. The only thing Trivium has released that is considered metal is 'Ember to Inferno' and it's consdiered Melo-Death
Pantera = Thrash metal.
Lamb of God = Metalcore.

Sorry. But I'm not adding Pantera for the reason Durrypoo said. XD

I thought Nightwish was considered Goth Metal. Or is Goth Metal not a real genre?

Agreed. Mr. Durrypoo: Would it be fair to call them Power Metal with Gothic Influences?

Their repertoire is comprised not only by Power Metal songs with keyboards, but also by some Gothic Metal songs, so I think Symphonic Power/Gothic Metal would be more precise, though Power Metal with Gothic Influences would be a fair generalization.

Oh yes, and for Black Metal, the album 'Icons of the Dark' by Myrk is a good pick.

Durrypoo, I dunno if this is asking too much of you, but would you be able to help me with this thread, like, when I'm not on for long periods of time, or when I just don't get around to updating? Being on Dial-Up, it's a pain in the arse.