And to be far, he was only doing Superman because he was Typecast.
Here's a little tid bit of knowledge I dug up on Reeves being typecast, in his own words.
"In the documentary "Look Up in the Sky The Amazing Story Of Superman", Jack Larson told how when he first met Reeves; he told him that he enjoyed his performance in "So Proudly We hail" According to Larson, Reeves said that if Mark Sandrich had not died, he would not be there in "this monkey suit". Larson said it was the only time he heard Reeves say anything negative about being Superman. In between the first and second seasons of Superman, Reeves got sporadic acting assignments in one-shot TV anthology programs and in two feature films, Forever Female (1953) and Fritz Lang's "The Blue Gardenia" (1953). But by the time the series was airing nationwide, Reeves found himself so associated with Superman and Clark Kent that it was difficult for him to find other roles"
Also, the 1 hour A&E Biography on George Reeves life made it very clear how depressed George was doing Superman, not being able to find other rolls as Hollywood producers would not except him as anything other then Superman.
Sounds like Typecasting to me.