Saw it a second time, and I liked it so much more than I originally did.
That was the case with me too when I saw it again in theatres. I think it had to do with the fact that I wasn't shocked at how ridiculously bad some parts were(the Kryptonite island-lift being the prime example), so I could just enjoy the movie as a whole.
By the way, here's how the phone call I got last week went...
My dad: So I caved and bought Superman Returns today.
Me: Are you serious? You have to take it back, we're ordering the Ultimate Collector's Edition when Amazon gets more in January, remember?
My dad: Yeah, but I just can't wait any longer. We'll get the Ultimate Collector's Edition then, but in the meantime we can watch SR.
Me: Why didn't you just rent it? It must've been $30!
My dad: Well it came with some other discs.
Me: What else?
My dad: Superman: The Movie, Superman II, Superman III, Superman IV....
Me: Wait, did you just buy it with the plain Chris Reeve set?
My dad: Pretty much, oh, except it also has Superman II: The Donner Cut, Look! Up In The Sky!, All the Fleishers, a disc of Singer's video journals...
Me: ...and by any chance did it come in a big metal case?
My dad: Yeah, and it says "14-Disc Ultimate Collector's Edition on the side"
I love my dad. And we now own the last Ultimate Collector's Edition in the CITY.