Malin Akerman created a swirling vortex of heart-breaking epic failure. Nothing personal to the girl but she cannot act. Acting classes prior to shooting might have done something. She tries, god love her, but she can't act at all.
Jackie Earle Haley was the film's saving grace. He brings the materiel to life and inhabits the character in a way nobody else really dared to. He made Rorschach a tragic psychopath while still having fun with it.
Billy Crudup brings the right amounts of apathy, removal, and emotion and creates something really impressive. He actually makes you forget that Manhattan is CG.
Patrick Wilson has a very admirable understanding of the fact that Dan is the audience's link to the story, and in an odd way is the heart of Watchmen. He doesn't really hold back in his endeavors to make Dan pathetic, sad, charming, depressed yet hopeful, and even almost-heroic when he tries.
Jeffrey Dean Morgan nails the comedian. Blake ended up being more of a supporting role than I'd expected, but he does it well. He mixes sexual, evil, violent, abusive, sociopathic, truthful, and tragic very well. He kinda reminded me of Jayne from Firefly from time to time, which I quite liked. He didn't do anything oscar-calliber but he did a damn good job. The scene where he cries in front of Moloch comes to mind. I think my favorite thing about him was his voice. ("MEDIC!!")
Ahh, Matthew Goode. The single biggest love-him-or-hate-him actor in the whole thing. He actually put a lot of effort and imagination into Ozymandias, which I completelty appreciated. I think the only reason he catches any **** is because he plays Ozy as id he had as many lines as he did in the comic book, which he doesn't. it's a fantastic performance, it's just not a full one, one that has all its oppurtunities delivered upon.
Matt Frewer is onscreen for about 12 seconds, but he still gives a performance, making Moloch the right blend of tragic, real, and satisfyingly weird.
Carla Gugino is just fine in her scenes as the younger Sally, but is uncomfortably bad in her scenes as an older Sally.
The guy that played Nixon was a cartoon. On a less related note, I wanted to see if his prosthetic nose would "SPROING" back into place if i pulled it back.