Cryptopsy - None So Vile
Gaza - He Is Never Coming Back
Cradle of Filth - Midian
Opeth - Blackwater Park
Eyehategod - Dopesick
Acid Bath - When the Kite String Pops
Burzum - Filosofem
Vital Remains - Icons of Evil
Will Haven - El Diablo
Nine Inch Nails - The Downward Spiral
If you asked me this tomorrow I might have some other ones. Just off the top of my head, when I think about favorites, these are what come to mind.
None So Vile and the Gaza album are the only guaranteed. Those are my top 1 and 2 albums. I'd probably call NSV my #1, but HINCB is the one that hits me in the gut harder.