OK first off I'll throw in the albums I haven't bothered with yet:

Pet Sounds
Born to Run / Nebraska / Darkness on the Edge of Town... you get the picture
MC5 - Kick out the Jams
Captain Beefheart - Trout Mask Replica (has anyone listened to this?)

And pretty much anything you care to throw into the "classic record" category by CCR, Elton John or the Grateful Dead.

Am I missing out on something special here by not listening to any of those listed above?