I just saw it and it's probably my least favorite of the Marvel movies so far. I generally had a good time, but some of the cinematography was a bit too noticeable. A lot of too-close quick cuts during the fights in the beginning, tilted cameras that made me notice the camera was tilted (when cameras draw attention to themselves, it's not a good thing for me). We're introduced to Natalie and crew rather quickly and they don't really establish why we should care about them, which makes it harder for me to buy that he would fall for her by the end of the film. When he does, it just sort of falls flat.
I think they had all the right pieces, they just needed to arrange them better and flesh a few things out. My thoughts are keep the beginning the same, but don't immediately cut back to Asgard and all of Thor's stuff. Tell that somehow through his interactions with the mortal main characters. By having Thor recount how he got there, you could show the same action, but then you get to see their reactions, which could be a nice comedy beat. Through this you could better reveal how Thor felt about it all, providing opportunities for him and Portman's character to connect, making the eventual romantic stuff more believable. the retelling of the events in Asgard could be spread across several scenes so it's not all thrown at the audience at once.
There's problems with my idea, certainly, but thinking about how all the scenes were ordered and how I related to the characters, I was really missing some development points that would have tied it together more neatly and made the payoffs better. Thor's character development just felt shallow, like they were hitting the right beats, but they weren't doing so in a really compelling way.
I liked it well enough and Heimdall really did steal the show. He was easily the coolest of any of the characters... no pun intended
