Death metal and grindcore are far and away my favorite metal genres, but i'll give anything a shot.
Some of my favorites include:
Anaal Nathrakh
The Black Dahlia Murder (shut up, they're not -core or sellouts, they're great)
Cattle Decapitation
Children of Bodom (shut up, they're awesome too, sans the vocals)
Coheed and Cambria (I like other stuff than metal, too)
Cryptopsy (fuck The Unspoken King)
Decrepit Birth
Defeated Sanity
Dying Fetus
The Faceless
Goatwhore
Into Eternity (shut up, The Incurable Tragedy was great)
Necrophagist
Putrid Pile
Rage Against the Machine
Soilent Green
Suffocation
Woe of Tyrants
P.S. I only review albums that I like. I find negative reviews to be a waste of my time, as I'd rather point out the good aspects of a piece of music than the negative aspects.