What I'm negative toward is Hollywood's seeming attitude that it's impossible to teach a bodybuilder how to act well enough to be the lead in a summer superhero blockbuster, which seems to be why we keep ending up with smaller guys like Reeve and pencil-sticks like Routh playing Supes on the big screen. I want to see someone that looks like Superman off-screen play him on-screen. Just once.
I would say that it's a lot easier to get an actor into shape over the course of six months than it would be to teach a bodybuilder how to act in six months. Despite what some folks seems to think, Superman is not the easiest part in the world to play. Not just anyone can do it.