Angelcorpse - meh, OK. Vivacious, but not resplendent(although to be fair, it doesn't aim for that). It's good, just not very complex.
Arcturus - good as gateway metal. Once you start listening to music more seriously the novelty that their circus approach possesses will quickly wear off, although the early stuff continues to possess some glimmer of beauty.
Ares Kingdom - lots of hype surrounding it, but still not bad. Competent, directed, but superfluous. Energetic enough, though, to merit at least a cursory listen.
Artillery - Likeable for its nostalgic value, but ultimately it makes me think of fat people jogging.
Candlemass - AWESOME
Cemetary - have only heard the debut LP, goofily-structured death metal of which the best thing can be said is that you can't fault them for trying... quirky, kinda dumb.
The Chasm - still trying to get into them myself. Common consensus is "highly regarded."
Coldworld - avoid like a plague of homosex. Self-indulgent grand-standing bullshit music.
Convulse - decent old-school death metal, but nothing outstanding. Above average, though. Fairly good.
Cult of Luna - only heard the '08 release; it was drab, but I guess good for the style in which it operated(which doesn't hold any appeal to me at all).
Dark Tranquility - fucking shit. Might as well listen to In Flames.
Depravity - YAWN
Destroyer 666 - about the same as Ares Kingdom
Esoteric - not bad, but overlong. Skepticism beats this by light-years.
Falkenbach - it's pretty sad when you can tell exactly how good a band is going to be just by reading its name.
The Flashbulb - as a whole this guy's work is only fair; some of it carries a lot of emotional heft, and a very sublime beauty throughout. But it's also very hit-or-miss. Boards of Canada provides a much more rewarding alternative.
Faustcoven - I enjoyed the first album; competent, if extremely basic. The second one, which I haven't heard, got a little sodomized on the main site's Sadistic Reviews sidebar.
Glorior Belli - average; at least it isn't outright shit.
Manilla Road - AWESOME
Mirrorthrone - avoid; the guy obviously has compositional talent, but no idea when to stop. Songs are way too open and loose.
Mourning Beloveth - only heard the '08 release; it was drab and any value it may have had was made irrelevant by the fact it's about drug addiction(lol).
Mr Bungle - hahaha, just no.
Neuraxis - I agree with nothingnowhere.
Nocturnus - overpraised. The Key is alright, but I'm guessing I could name a hundred albums I'd rather listen to over it.
Ondskapt - see also: Watain, Funeral Mist, S.V.E.S.T., Deathspell Omega, etc...
Pensees Nocturnes - somehow this got a lot of praise around here. I find it laughable.
Primordial - like a shittier Esoteric.
Riverside - this is what the modern man listens to while inserting his tampon and applying mascara.
Rottrevore - although the fact their LP is politically themed(lolwut), it has some solid musicality. Holds some parallels to the Dutch death metal scene in its battering intensity.
Slaughter - AWESOME, at least the older stuff is. Strappado easily beats out its contemporaries in sheer violence.
Solefald - like Arcturus, holds some novelty value, but not much more. Well, at least the first two albums do - the last one was outright horrid.
Solitude Aeternus - good for what it is - doom of the "it's really just basic heavy metal played really slow" variety.
Soundgarden - if you MUST listen to rock, this is one of the few bands in the genre that manages to pull off some credible fire, but that's mostly just because of the vocalist.
Temnozor - I agree with nothingnowhere.
Ved Buens Ende - avoid like a plague of homosex. Self-indulgent LOOK-AT-ME "oddness"(aka attention whoring).
Venetian Snares - dull, boring, uninspired "experimental" electronica.
Winter - pretty cool; Disembowelment is better.