Rating: 3/4
As per mythology, Thor is the hammer-wielding God of thunder and lightning after whom Thursday ("Thor's day") gets its name. However in Marvel's comic book universe, he is one arrogant son-of-a-God who, much against his father's wishes jeopardizes the feeble truce that exists between his kingdom of Asgard and the Frost Giants. Angered by Thor's arrogance, his father-and-king Odin(Anthony Hopkins) strips him of his powers and banishes him from Asgard to live on Earth as a mortal.
Much of the movie's creative efforts have gone into the visual-effects and writing departments which partly make up for the pretty simple plot. Jotunheim, the cold, crumbling and dark home of the Frost Giants oozes with artistically-rendered menace and also adds to the creepiness of its inhabitants. In comparision, Asgard is not so imaginatively depicted. The clash between Thor and the Frost Giants on Jotunheim in the first half of the movie is unarguably the highlight of the movie and is on-par with what we have seen in Lord of the Rings. However on the downside, this rises the bar a few notches too high for the rest of the movie to attain. Kenneth Branagh's script infuses humor into the proceedings, just as Jon Favreau's did to Iron Man, which is a good thing because it allows us to forgive some of the weaknesses of the movie.
Talking about weaknesses, Thor's nemesis is not intimidating enough. He is quite a manipulative guy, I 'll give him that, but I expected him to be at least as menacing as his minions. This is primarily why the climactic clash is a letdown. The four warrior friends of Thor who would have been interesting had some time been spent on characterizing them, come across as excess baggage. I am not sure if Branagh has to be blamed for it, its probable that the producers have decided against spending any more time and money on a bunch of disposables - Thor will return to Hollywood in The Avengers (2012), his four friends wouldn't be so lucky.
The acting is uniformly adequate though Stellan Skarsgaard surprised me with his funny turn. Natalie Portman is funny and cute and so very un-Black Swan-like in a good way. There is no motion blur with the 3D, although it could have done with slightly more lighting during the first half-hour. All in all, its fun spending an afternoon with Thor.