I forgot to add one of my favorite albums from 2011!
Unknown Mortal Orchestra - self titled
Their sound is awesome and cute. It almost seems as though this band is from a different time and place. Take a listen. You'll see what I mean.
And a few late entries...
The Black Keys - El Camino
Some have criticized them for selling out their sound. I don't understand it because they continue to sound pretty great. Sure, there's a song on here that's a combo rip off "Stairway to Heaven" and "Mary Jane's Last Dance". But, who cares.
The Roots - Undun
There are some real gems on this one. I love that there's a hip hop band out there. With a real drummer. Plus, it's pretty awesome what they pulled on M.Bachman on Jimmy Kimmel.