Y the Last Man, still running, amazing concept, likeable characters, very addicting.
Fables, also still going strong. The concept is genuinely brilliant, the characters are all good and the many stories are just awesome.
Sandman, the best graphic novel series out there. Period. This series goes deeper than many literature, has stories from Shakespeare to... to God knows what. ****ing Amazing.
I didn't really like Akira. Only read the 2 first novels, and while the story and artwork is nothing short of amazing, the characters are all cardboard and do nothing but scream all the friggin time.
I've also started on Hellblazer, which has some good issues and supposedly the Garth Ennis volumes are great, but I couldn't really care. Also started on 100 Bullets, with again an awesome premise, and the Watchmen, and both look pretty good.
And of course how could I forget The Preacher? It's a bit of a guy thing, but hey, aren't all comics and graphic novels? The dialogue and story is awesome, and even though it does become slightly weaker near the ending, it's still feckin awesome.