[AC]

Here's my list of worthwhile metal to check out from 2011:

Black Metal:

NSFW!

Absu - Abzu
Byfrost - Of Death
Enslaved - The Sleeping Gods
Mitochondrion - Parasignosis
Oranssi Pazuzu - Kosmonument
Peste Noire - L'Ordure à l'état Pur
Sarke - Oldarhian
Vreid - V

Death Metal:

NSFW!

Autopsy - Macabre Eternal
Benighted - Asylum Cave
Cianide - Gods of Death

Deceased - Surreal Overdose
Ghoul - Transmission Zero

Obscura - Omnivium
Septic Flesh - The Great Mass

Unholy Cadaver - Unholy Cadaver

Doom / Sludge Metal

NSFW!

Barn Burner - Bangers II: Scum of the Earth

Black Tusk - Set the Dial
Blood Ceremony - Living with the Ancients

Boris - Heavy Rocks II
Hunters - From Birth to Soil
Uncle Acid and the Deadbeats - Blood Lust

Weedeater - Jason... the Dragon

Grind:

NSFW!

All Pigs Must Die - God is War
Brutal Truth - End Time
Rotten Sound - Cursed
Total ####ing Destruction - Hater
Trap Them - Darker Handcraft

Wormrot - Dirge

Misc:

NSFW!

Devin Townsend - Deconstruction (Progressive Metal)

Mastodon - The Hunter (Progressive Metal)
Opeth - Heritage (Progressive Metal)

Pain of Salvation - Road Salt Two (Progressive Metal)
Turisas - Stand Up and Fight (Folk Metal)

Týr - The Lay of Thrym (Folk Metal)

Thrash Metal:

NSFW!

Exmortus - Beyond the Fall of Time
Havok - Time is Up

Headshot - Synchronicity
Warbringer - Worlds Torn Asunder