I'm with rodshark. I saw 300 last night, and it certainly wasn't a bad movie - it was what it was - a comic book adaption that faithfully reproduced the art using actors. Something that i'm finding increasingly cool these days.

It was fun to watch for the same reason The Matrix was fun to watch. The acting was just as wooden. The SFX were as good (albeit not groundbreaking). The plot was just as thin.

Certainly if you try to treat it as a historically accurate epic, it's going to fall short. Even the director admits that.