I have yet to read the graphic novel. I do have, er, it.
Have had it since the movie came out, but never did read it. Now I want to. I thought the movie was excellent as a painting in motion. Every scene is painstakingly set-up, lighted, executed, and then intensely post-processed. Many snapshots of the film would work in a canvas on a wall.
Pug, I knew you weren't Persian. I did think, though, that you would be closer to the Persian point of view than the classical Greek. Am I wrong? I also do know what Iranians look like. My father's partner was Iranian. I was friends with several of his children, and almost dated his oldest daughter. We liked each other enough for that anyway, but it never happened.
Edit: OK, now I have read the graphic novel. The movie is surprisingly faithful. The novel serves as the storyboard, except it seems for some tacked-on drama involving an ambitious Athenian traitor and the stoic Spartan queen. The look of the movie is mostly straight out of the book as well. The novel does give the Persians an air of evil which reflects in their outward appearance, though it does not go to the horrid extent the movie carries it. In all, I'm more impressed with the movie now than before.