Well I guess I'm up to posting one of those long as hell lists. I've been into Metal for 6 years now and have delved into just about every sub genre in it. I've got favorites in all of them, but the big two for me are Black Metal and post-Harcore/Metal (basically everything that's come out from what Neurosis started).
Here's my list of favorites (un-sorted):
Enslaved, Agalloch, Neurosis, Burzum, Godflesh, Swans, Mastodon, Bathory, Blut aus Nord, Morbid Angel, Metallica, Tool, Motorhead, Opeth, Slayer, Megadeth, Sepultura, Black Sabbath, Judas Priest, Iron Maiden, Fear Factory, Velvet Cacoon, Watain, Mayhem, Darkthrone, Voivod, Kreator, Leviathan, Xasthur, Isis, Cult of Luna, Jesu, Ministry, Rammstein, In the Woods, Carcass, Behemoth, Nile, Red Harvest, Arcturus, Amorphis, Electric Wizard, Moonspell, My Dying Bride, Paradise Lost, Anathema, Pelican, Emperor, King Diamond, Immortal, The Melvins, Ulver, Satyricon, Amon Amarth, Primordial, Danzig, Anthrax, Cave-In, High on Fire, Blind Guardian, Iced Earth, Evergey, Cruachan, Thyrfing, Deceased, Nevermore, Savatage, Athiest, Death, Zyklon, Borknagar, Dimmu Borgir, Cradle of Filth, Gorgoroth, Summoning, Taake & more.
NP: Voivod- The Unknown Knows