Here's a few more for everyone.
Black Hole by Charles Burns. Think teenage mutation in the 60s, if it didn't give the affected superpowers, and it was sexually transmitted.
Hellblazer. Pretty much any of it. I like to go to used bookstores and just grab whatever volume I can find. Then I sit back with a decent glass of scotch and it feels like catching up with an old friend. If you guys like Ennis, his run is damn good. But the early stuff by Jamie Delano is just fucking crazy.
Like a Velvet Glove Cast in Iron or
David Boring by Daniel Clowes. Yes, it's the guy that made Ghostworld, but this stuff will leave you cold and haunt your dreams for months. It's this crazy isolated cynicism that just scrapes at your spinal chord.
The Filth by Grant Morrison. If you read it fast enough, you can attain premature enlightenment.
Technopriests by Alejandro Joderowsky (that other dude that was gonna direct Dune) and Zoran Janjetov. Imagine someone in Spain attempting to explain Dune, Star Wars and Star Trek to someone, but they only saw it once, and it was really late, and they thought the stories needed more rape. The first volume is amazing, and it kind of goes steadily downhill from there. But worth a look.
Anything by Crepax, Milo Manara, Moebius, and the other guys from the European school are all pretty amazing as well.
And lastly,
Holli Hoxxx by Adam Tinius, Austin Tinius & Stefano Cardoselli.
In the future, there is no gravity. Book one comes out later this month.