Reeve is my Superman. For me, it doesn't get any better than Superman: The Movie and Superman II (especially the 1980s extended cut from ABC). I also enjoy Superman III as a guilty pleasure.
I'm glad to see Dean Cain get some love here since I've always enjoyed his portrayal, especially his Clark Kent, which was a nice version for the 1990s.
Routh channeled Reeve, without imitating him, but the movie wasn't what it could've been. I've been a bit hard on Cavill. Like Routh, I think Cavill would've fared better if the material was better. As it is, Superman Returns and MOS are the tale of two extremes: too little action and too much action. Superman II is my perfect Superman movie, even if it is dated in certain respects. (It *IS* 35 years old and takes place during a different era in comic book history.)
As a kid, I used to think George Reeves was what I would settle for. I'm too young to operate the VHS and have to wait until dad gets home to put on Superman II, so I might as well get my Superman fix with this old Superman show.
But as an adult, I've grown to REALLY enjoy George Reeves' portrayal. He's probably my second favorite Superman now.