The best thing about Reeve's performance was that he portrayed absolute virility and confidence without ever coming across as swaggering or macho. That was the genius of his performance. He was badass and capable but also always nice and good, never *****ey or smug or threatening. He pulled of a brilliant balance me thinks where he absolutely looked and acted like the powerful god that he was but always undercut with humility and winning concern for the people.
Cavill still needs to get there. Cavill has the face, has the physique. I think he slightly lacks in the acting department but he can always learn that. But I wonder if you can "act" confidence. You have to "be" confident to be able to fully pull of the surety of a character like Supes.