i agree on the dialogue for the most part. it worked well for the gods and their epic proclamations of very simple things, but for the human characters it was very stilted and wooden.
the comedy was handled well by playing the character completely straight, and avoiding the usual 'fish out of water' cliches. the story was pretty basic and one dimensional, as were most of the characters, but that was fine. the one exception to this was loki, who was enjoyably much more layered than the usual supervillain from these movies.
visually, i do have a complaint about the fight scenes, as they overused the shaky-cam and quick-cuts to an extent that sometimes made it hard to distinguish exactly what just happened. other than that, the film looked good, with a unique aesthetic for asgard that was suitably over the top and embellished.
overall, a very enjoyable 'popcorn flick' without much substance, but enough style to make up for it, as well as it's moderate sodomization of norse mythology.
also, how fucking cool was that image of anthony hopkins rearing up on slepnir in a bolt of lightning?