Strangers In Paradise: A story about relationships with a little action mixed in. Everybody is trying to look for intimacy and love while forces outside their control are running interference.
Kurt Busiek's Astro City: What is it like to live in a universe where superheroes live? What is it like to be a sidekick, child super hero, or a normal criminal in this world? These and other questions will be answered in this book. Like Marvels, Busiek makes us see the superhero through new eyes.
Luftwaffe 1946: If you are into manga style art, alternate timelines and cool looking airplanes, then this book is for you.
Any book by Peter David: One of the few who can make superheroes interesting and not distasteful anti-heroes(others are Mark Waid and John Byrne). Perhaps the best book he has is Supergirl. It is nice to see a comic focusing on redemption. Try and find his independently made comic Soulsearchers by Claypool. This one of the funniest comics there out there.