Pretty good really, never read the graphic novel, but recognise Moores style, loved the alternate history approach, but then again I'm a sucker for that. The soundtrack was awesome, and the setting pretty spot on, there were times I thought I was watching a film shot in the 80s, although that could have been Dreiburgs glasses
Rorshach kicked ass, particularly in the prison cell, but reminded me a little too much of another character Moore used, the Invisible Man, but nevertheless well played.
As for the blue man wang group, I honestly didn't notice it that much, but that's just his character I guess, like Falkirion said, he doesn't see things the way others do.
All in all, a good film, the sex scene was a bit unecessary, although the flamethrower was humorous (that got those of you who ain't seen the film curious, eh?
), dark, gritty, humourous in places, worth a look even if you've never read the graphic novel.
EDIT: One other thing, in the scene in Archimedes heading for Ozymandias's base, did anyone else expect to see Hueys flying to the soundtrack of Hendrix's cover of 'All along the watchtower'? It's just one of those songs that automatically makes you think of the Vietnam war.