LauraEss:
Image
Art, because this book showed that a) you could mix biography with very different styles, b) have a biographical graphic novel that made an impact on a lot of people, and c) have it in more than one part:

FUH. YES. THIS. Honestly, I used to read manga and avoided all other forms of comics simply because I wasn't that interested in more cartoon styles or superheros. But after reading Maus, my whole opinion changed. I've always had a fascination with Holocaust survivor stories, and just human nature in general, so this book was the pinnacle of what I wanted from comics.
also, Mccloud is pretty good too. I've only recently read his book "Understanding Comics", but I found it very involving and inspiring.
My friend also introduced me to a series called Frank.

I think that finally pulled me out of my manga craze, and into more abstracted options.
I'm not too educated in the world of comics, but I've come to really enjoy it since I've gone to college this year. Originally I wanted to major in animation, but I think I'm pretty set now.
(Actually, the other day I went to this sequential art portfolio review by some big name artists at this career fair. and holy mother of GOD. All the upperclassmen's work were so beautiful ;___; not just in detail, but overall page flow and dynamics, perspective, line weight, black placement. It really gave me a perspective on how far I still need to go.)