Okay, I saw Thor on Saturday. I liked it pretty well; somewhere between Iron Man and Iron Man 2. The motivations of the characters were kind of thin, but fairly clear. Portman wants her science-y stuff back and is hot for Thor's muscley body, and Thor wants to get back into Asgard and deserve it. I thought the grab-the-hammer moment was particularly well done; it told me a lot about his emotional state without explaining it in words.
However, I had little to no idea who Thor's Asgardian friends were. I recall him saying the female warrior "Sif" but beyond that, I was as clueless as the SHIELD agents. I was also immediately tired of seeing the Asgardians get their asses handed to them, first by frost giants, then by Odin's magic furnace robot Destroyer thing. Seriously, how was that thing supposed to make any sense?
Loki's plan seemed pretty muddy, especially after he seemed to get what he wanted. But most of all, I just didn't go for the whole passing-of-the-crown-from-Odin-to-Thor idea that the movie was built on. Odin was king for 2000 years; is that just how long Asgardians live? I want my gods timeless and endless until Ragnarok.