These charts are highly biased towards my listening habits in the first 3-4 months of the year. I had a lull in listening from about April to September; I was sick, my headphones broke, I had to reinstall my operating system, and for a while I just didn't "scrobble" my plays. I'd also like to point out that I listened to Nether Regions and Witch Mountain 900% more than these portray - last.fm doesn't believe music exists until it physically exists. Also, Salvador was near the top of the song chart but their album doesn't come out until next year as far as I know.
That said, here are some lists! These run from about December 12th 2010 to today.
Top 10 Listened Artists
Black Cobra
Tool
Melvins
Kyuss
Monster Magnet
Marilyn Manson
Red Fang
Weedeater
Tomahawk
Tweak Bird
Top 10 Listened Albums
Black Cobra – Invernal
Black Cobra – Chronomega
Weedeater – Jason... The Dragon
Them Crooked Vultures – Them Crooked Vultures
The Black Angels – Phosphene Dream
Nether Regions – Into The Breach
Red Fang – Murder the Mountains
Tweak Bird – Tweak Bird
Ill – Gotten Gains
Tool – Ænima
* that came out in 2011
Black Cobra – Invernal
Weedeater – Jason... The Dragon
Nether Regions – Into The Breach
Red Fang – Murder the Mountains
Ill – Gotten Gains
Parts & Labor – Constant Future
Graveyard – Hisingen Blues
Dark Castle – Surrender To All Life Beyond Form
YOB – ATMA
Wizard Smoke – The Speed of Smoke
Top 50 Listened Tracks (that came out in 2011)
Weedeater – Jason... the Dragon
Weedeater – Homecoming
Red Fang – Painted Parade
Black Cobra – Beyond
Black Cobra – Corossion Fields
Dark Castle – Seeing Through Time
Ill – A
Nether Regions – Outrun the Sun
Foo Fighters – Rope
Black Cobra – The Crimson Blade
Parts & Labor – Constant Future
Lo-Pan – El Dorado
Nether Regions – Spanish Werewolves
Red Fang – Number Thirteen
Ill – One Time
YOB – Adrift In The Ocean
Black Cobra – Avalanche
Lord Dying – In a Frightful State of Gnawed Dismemberment
Towers – Machine
Wight – Hammer Boogie
Grails – I Led Three Lives
Battles – Sweetie & Shag (feat.Kazu Makino)
Ill – There Are Worse Things Than Being Alone
Red Fang – Hank is Dead
Nether Regions – Blood Ritual
Ill – Castration
Weedeater – Turkey Warlock
Sandrider – Crysknife
Graveyard – Rss
Parts & Labor – Rest
Earthless – Demon Lady
Graveyard - Hisingen Blues
Wizard Smoke – Dead Wood
Premonition 13 – Hard To Say
Norska – They Mostly Come At Night
Weedeater – Mancoon
Castle – Total Betrayal
Ill – Bitch
YOB – Prepare The Ground
Black Cobra – Somnae Tenebrae
Towers – The Fields
Graveyard – Ain't Fit to Live Here
MEN – Boom Boom Boom
Krallice – The Clearing
HAWKS – royalty
Witch Mountain – Plastic Cage
Wight – Wight Weedy Wight
Foo Fighters – White Limo
Weedeater – Palms and Opium
Black Cobra – Obliteration