I didn't even see Sucker Punch. Or Legends of the Guardians, whatever that is. Watchmen and Dawn of the Dead are great, 300 is pretty good, and if he's made anything else, Wikipedia isn't telling me about it. So I don't really have all that much to judge him by.
As for Superman, my feelings on the Christopher Reeve movies are that the movies were entertaining, and certainly groundbreaking for their time and genre, but really not all that captivating for me. Superhero stories are definitionally unreal, but I don't like them to feel completely unreal, and the original Superman movies do feel that way to me. To be honest, though, that might just be me projecting my problems with the character of Superman itself (something about nobody recognizing Clark Kent just because he takes off his glasses - it's always bugged me).
At any rate, I'm curious to see a modern take on it.