Starman: start with volume 1, “Sins of the Father” (by James Robinson and Tony Harris).
Preacher: start with volume 2, “Until the End of the World” (by Garth Ennis and Steve Dillon).
These are my all-time favorite long-form comic book series, and I’d be envious of anyone who gets to read them again with fresh eyes.
Which Grendel Tales do you have? My far-and-away favorite is “Four Devils, One Hell,” by James Robinson and Teddy Kristiansen.
If we’re talking original Grendel, “Black, White, and Red” by Matt Wagner and various artists is also excellent, as is the follow-up, “Red, White, and Black.” However, a solitary single issue, “Devil By the Deed,” is the first Hunter Rose Grendel story, and the Batman/Grendel crossover is a must-read as well.
Alan Moore’s V For Vendetta. 'Nuff said. Awe-inspiring. Made my hands shake as I was reading it, it was so good.
Daredevil: Born Again (by Miller and Mazzuchelli).
Batman: Year One (by Miller and Mazzuchelli).
The Dark Knight Returns (written and drawn by Frank Miller).
Catwoman: The Dark End of the Street (by Ed Brubaker, Darwyn Cooke, and Mike Allred).
Anything Madman (written and drawn by Mike Allred).
Box Office Poison (written and drawn by Alex Robinson).
Justice League: A New Beginning (by Giffen, DeMatteis, and Maguire).
Why I Hate Saturn, The Cowboy Wally Show, I Die At Midnight, and You Are Here, all written and drawn by Kyle Baker.
Absolute Authority (an oversized edition), reprinting the classic run by Warren Ellis and Bryan Hitch.
Planetary: All Around the World (Warren Ellis and John Cassaday).
Top Ten, Books 1 and 2 (by Alan Moore and Gene Ha).
The Golden Age (by James Robinson and Paul Smith).
Hellboy is a lot of fun, but everyone has their own favorites. “Seed of Destruction” is the first TPB in the series, though (by Mike Mignola with help from John Byrne).
Sandman Mystery Theatre: The Tarantula (by Matt Wagner and Guy Davis) - brilliant crime/noir series that deserves more reprinting in TPBs.
Y: The Last Man: Unmanned (by Brian K. Vaughan and Pia Guerra).
Powers: Who Killed Retro Girl? (by Brian Bendis and Michael Oeming).