Some all-time favorites:
Ani DeiFranco-Dilate
NIN-Pretty Hate Machine
NIN-Downward Spiral
Nirvana-everything they ever recorded
The Breeders-Last Splash
The Pixies-Doolittle
The Pixies-Trompe le Monde
Kate Bush-The Dreaming
Peter Gabriel-everything he's ever recorded
R.E.M.-Automatic For the People
Gipsey Kings-Tierra Gitana (listening to this right now)
Fleetwood Mac-Rumors and The Dance
The Beatles-The White Album
Simon and Garfunkle-The Greatest Hits
Jane's Addiction-Ritual de lo Habitual, Nothing's shocking
Ministry-The Land of Rape and Honey
Adam and the Ants-Kings of the Wild Frontier, Prince Charming