I was on the verge of putting "Everybody knows this is nowhere" on my list but the fact it was on yours swung it back the other way.

Close calls for me where System of a Down's first self-titled album, Far Beyond Driven by Pantera, Ænima by Tool, The Black One by Sunn0)))), Pink by Boris and Dopesmoker by Sleep (or possibly Holy Mountain depending on my mood).

I didn't put any punk on their either which is under-representing my CD collection, or hip-hop. I mean I would consider "Brand New Second Hand" by Roots Manuva essential listening but this isn't really the time or place. 

"Smoker's Delight" by Nightmares on Wax or "Double Figure" by Plaid are pretty much essential albums for any stoner... just they are electronic music.

*Big in Japan*