Treehouse

I don't have much to say about this album that hasn't already been said. It's brilliant, Radiohead's finest moment, and the sum really is greater than its parts.
Key Tracks: Everything In It's Right Place, Kid A, The National Anthem, Idioteque
Hat tip to Nigel Godrich

Groovy as all bloody hell. One of the best albums the aughts has to offer.
Key tracks: Get Innocuous, North American Scum, All My Friends, Sound of Silver
Hat tip to James Murphy

This album blew me away upon first listen. Beautiful lyrics, and some of the best instrumentation I've ever heard. It's an album that makes me feel small, in a weird sort of comforting way.
Key Tracks: Montezuma, The Plain/ Bitter Dancer, Helplessness Blues, Lorelai
Hat tip to J. Tillman

Rubber Soul is the granddaddy of them all, and for my money the greatest album of all time. I shit you not, folks. It's flawless, the first great album from the Fab Four and an inspiration for countless others.
Key Tracks: Norweigian Wood, Michelle, Girl, In My Life
Hat tip to Brian Wilson