Way too many to mention. I've been a metal-head since I bought my first album (Black Sabbath - Paranoid) in the early 70's and have progressed along with the genre. I'll mention a few of the somewhat relatively obscure post-2000 releases and maybe come back for pre-2000 later. There are tons of great individual songs outside of these albums. If anyone cares maybe I'll mention a few later.
Post-2000
(Doom)
Trees of Eternity - Hour of the Nightingale. (my favorite post-2000 album)
Draconian - Sovran
(Thrash)
Warfect - Exoneration Denied
(Death)
Aeon - Aeons Black (easily my favorite death metal album)
(Metalcore)
Cataract - With Triumph Comes Loss
