I think
Teen Dream by Beach House probably tops the list for me. I haven't followed new releases this year, but it stands out from the ones I know are 2010.
High Violet by The National is close enough, but to be honest the fact that it came out with the impossible expectations set by Boxer to bear means it didn't quite reach the top. Boxer is probably in my top 3 all time.
Vampire Weekend's Contra and
Congratulations by MGMT would probably both make it to a Top 10 list of the year, as I really enjoyed both.
Same goes for Arcade Fire - The Suburbs -- I just don't tire of their sound! Another outsider for a spot is The Morning Benders with Big Echo. Their poppy yet expiremental sound really struck a chord (he-he) with me! The Gaslight Anthem's American Slang is probably in with a shout too.
Other albums I can remember enjoying from this year are:
Best Coast - Crazy For You
Broken Bells - S/T
She & Him - Volume Two
Yeasayer - Odd Blood
Bonnie Prince Billy & The Cairo Gang - The Wonder Show of the World
Laura Marling - I Speak Because I Can
Two Door Cinema Club - Tourist History
The Tallest Man on Earth - The Wild Hunt
Band of Horses - Infinite Arms
Against Me! - White Crosses
But none of these really feel strong enough to warrant a place in a yearly top 10 list for me however. I missed out on a lot, and I see top 10 / 20 lists from people with the same taste as me consisting of 50% artists I've never even heard of, so I can't really complain! Heck, I haven't even listened to Age of Adz yet.
2011 should be great though, new Iron & Wine in January, new Death Cab, new Manchester Orchestra. I'm liking the the sound of Adele's new single from her upcoming album, and I'm really REALLY hoping for something by Bon Iver. It's a long shot as nothing's been announced, but it's about time. Can't live on For Emma forever (he-he)!
Don't mean to nitpick, but XX was '09. Otherwise it would be top of my list for sure!