Oh, boy. I agree in general with most of Andy's comments (but not all).
I thought the movie felt like it was shot from a first draft script. There are a lot of good ideas in there, but they just aren't developed or played out to their fullest potential. I
really like the idea of a kryptonite-laced continent. (BTW, Andy, you wondered "just how exactly does Superman manage to avoid the Kryptonite all over the mantle of Lex's new continent at the end of the movie and save the day?" He doesn't; the kryptonite leaves him completely spent after sending the continent into space. Of course, one could question why Kryptonite has such varying effects on him throughout the movie. I wondered how he didn't notice the Kryptonite when he first arrived to confront Luthor, or at least until it was dramatically convenient

).
I really don't have a problem with the actors. All of them had some good moments which indicated their potential. Again, I would blame the underdeveloped script.
I wish we would have seen a final confrontation between Luthor and Superman. Instead, Luthor just slinks away after his plan fails. I missed seeing a more satisfying resolution to their conflict.
I actually liked the way they underplayed Lois' son and his abilities, and look forward to seeing how they deal with him future installments. I think there is a lot of potential there if they continue to deal with it the way they did here. (No SUPERKID, please!)
I would have liked to have seen more humor in the dialogue. There was a little here and there, but not nearly enough. The Lois in the first two movies had "snap"; this one doesn't. What happened to good, old-fashioned "banter", particularly between Lois and Clark? (In fact, there's little interaction between L&C. Why not? She's angry at Superman, not Clark.)
Did anyone else think the movie looked annoyingly
dark? Every scene seemed to be overcast, or at dusk. They seemed to be afraid of showing any splashes of primary color, which I always found inextricably linked with Superman, starting with the costume itself. Everything just seemed gray and drab.
Andy, I do have to disagree with you on the music. I'm tickled to death with Ottman's score! (And I'm bored by most current superhero scores.) I've listened to the album literally dozens of time in the past couple of weeks (first streaming online and now the CD itself) and it completely captures the mood of the movie I was hoping to see, if you know what I mean. He uses the classic Williams compositions as pillars on which to hang his original music, and together I think they form a very sturdy musical structure. I truly don't understand your "plastic" comment, because that's how I've always thought of Thorne's SII score, and as far as I'm concerned, this new score blows that old disappointment out of the water. Frankly, I think this score (and its album) is about as good as it could have been.
I have plenty more to say (and probably will), but I'm going to end here for now. Overall, I'd probably rate it two-and-a-half stars out of four. Not bad by any stretch, but certainly a disappointment.
Mark