Script- Just trust them, the bad guys are trying to destroy the world or worlds. The how is very complicated science-magic. So, just go with it and have fun. It is a popcorn movie to be sure. Don't try to understand it. I said, STOP!
Acting- The acting was great, I mean you have serious hard hitting actors in this movie and that wasn't going to be a problem. Natalie Portman has way more chemistry with Thor than she did Vader. I just wondered if she told Thor that she wasn't at the battle of New York because she was having another man's baby at the time. I am sure it will come out in the sequel. Also a remarkable performance was put in by Kat Denning's boobs.
Overall- A fun popcorn movie. It wasn't The Avengers and I think it was better than the first Thor. The character is changing and becoming more heroic. They are writing him with a bit of depth. I would list it as fun for the whole family. Marvel has another winner here. Will DC ever respond.