I've enjoyed Saga so far so I thought I'd check out another highly-rated graphic novel by Vaughan, the complete "Y: The Last Man" (I love when series are already finished). This one follows the exploits of Yorick Brown, the last man left on the planet after a mysterious plague instantly and simultaneously wipes out every mammal with a Y chromosome -- except him and his pet monkey Ampersand.
The books follow his journey with some badass women as they try to figure out what happened to all the men and how they can possibly save humanity. Yorick also spends a lot of time trying to reunite with his fiancée who was in Australia at the time of the incident.
The ultimate moral of the story is not exactly clear (at least to me), but I found the world (re)building interesting. In the early volumes chaos and violence are everywhere. Vaughan does not presume that a world without men would be a peaceful utopia. As the years pass the chaos subsides slowly as the women still alive work to bring back some semblance of civilization. The new world is different, but still has many of the same problems of the old. The worse aspects of humanity (greed, jealousy, nationalism, etc.) remain to greater and lesser degrees in the survivors.
I read the entire series in eBook format (borrowed from the SF library). This worked well for me, especially since I read most of it while traveling in Europe. Overall I enjoyed the series, but I think I maybe like Saga better.