Christopher Reeves was such a good Superman because he was a pretty weak looking man. This was, in my opinion, what made him so great. The fact that someone as weak and frail could be so incredibly strong was symbolic.
Brandon Routh has muscles, albeit, not very big ones but I suppose he's started to work out lately as to fit the role of Superman better. Christopher Reeves DIDN'T have the muscles.
Can anyone else see where I'm coming from here?