Your favorite album cover...

Album cover art ain't what it used to be.
I always admired the R. Crumb Big Brother cover.
Sticky Fingers is worth framing.
Hated Beggars Banquet and the White Album covers.
Neon Parks was fun, the Last Record Album and Weasels Ripped my Flesh come to mind.
London Calling is my favorite, a take off of an old Elvis album cover that captured the spirited intensity the band was producing at the time.
The Beatles 1967-70 (Blue Album)

Rubber Soul 
Sgt Pepper
Abbey Road
Bringing It All Back Home
World Gone Wrong
Trout Mask Replica
The Hangman's Beautiful Daughter
Morrison Hotel

There were tons of colourful and pretty LP sleeves from the likes of lounge artists like Martin Denny but one more recent image worth seeing is from 2004 by Tortoise : It's All Around You.
1975 Elton John, Captain Fantastic and the Brown Dirt Cowboy! Artwork by Alan Aldridge.