Scott Pilgrim. I've been obsessed with it lately, just got through the 4th book. I'm rationing myself to buying a new volume every other week or so because I know I'll be so sad when I've finished it.
I just relate so much to the characters in the book, especially Scott himself. Were both average guys in our 20's who play instruments, video games, zone out constantly, and obsess about getting a haircut when our hair gets long while never doing anything about it. I love every one of the other characters in the series, and feel like it would be so cool to be friends with them.
I really really like the comic's visual style, and the writing is so funny and full of references to all these nerdy things that are really relevant to my life. As I get farther into the series, I'm also loving the frequent throwbacks to jokes in earlier volumes, and the deep character development Scott goes through. Seriously, at the point I'm at right now, he is radically different from the way he was at the beginning of the story. I briefly glanced at the first book this morning and was like, "Wow he was such an asshole before."