Glad to see the love for Agalloch, that album was great.
Howl was pretty good, doesn't really push the stoner envelope but it's a fine album.
Toro y Moi - Causers of This (Can't remember the last time I was this consistently addicted to an album. Hazy lo-fi synth pop stuff... this shit fucking hypnotizes me.)
Celeste - Morte(s) Nee(s) (Epic French sludgy screamo band, really solid album.)
Emeralds - Does It Look Like I'm Here? (One of the more interesting experimental electronic/ambient albums I've heard in a while. I don't see myself tiring of hearing this any time soon)
Loscil - Endless Falls (Yet another terrific ambient album from Loscil. This may very well be his best yet)
Jack Rose - Luck in the Valley (RIP. As always, beautiful acoustic picking)
Gorillaz - Plastic Beach (I didn't like the whole album, but some songs - i.e. "Rhinestone Eyes," "On Melancholy Hill," "Plastic Beach" - were almost certainly my most-listened-to of '10)
The Tallest Man On Earth - The Wild Hunt (Crazy incredible rambunctious folksinger. This guy shouts and hollers and beats the shit out of his guitar. The lyrics are incredible all the way through. Certainly the best folk album I've heard in several years)
Waka Flocka Flame - Flockaveli (I've been digging a lot of obnoxious trap-hop recently, and this dude totally embodies that. Sure he's not the best lyrically but his style is undeniable, he's got great presence and the beats are solid all the way through. Heavy, scary rap)
Young Jeezy - Trap or Die 2 (Mixtape of '10 for me. I feel like ppl forget about this 'cuz it came out earlier in the year but if it's any indication of his next album then it will be spectacular)
Kanye West - My Beautiful Dark Twisted Fantasy (I'm really not always fond of Kanye as a rapper, but he's always had some nice songs, and has improved a lot on this album, and from a production standpoint this is certainly his best work yet)
Big Boi - Sir Lucius Left Foot (Probably the most listened to hip hop album of '10 for me. This was blasted all summer. Every single song is incredible, even the skits are funny)
I might be missing a few, I gues, but those came to mind pretty quickly. I listened to a lot less music than I usually do this year, busy n stuff.
Looking forward to listening to some of yours, this site has some ppl with good taste esp. in metal which I didn't listen to a whole lot of this year.