Movie-wise,
Iron Man > Captain America >>> Iron Man 2 >>>>> Thor
Thor was poor for several reasons. Way too much time was spent on unimportant mortals, causing little to happen for a good half hour of the movie. Then the villany was poorly done-first the frost giants are the enemies, then the government, then Loki after a nonsensical freak-out on his part sort of tries to take over the antagonist role but just generally does it poorly. Also, I would've appreciated a lot more time being spent on Asgard and whatnot, as a non-reader, I have little understanding of anything that's going on up there.
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http://www.nbc.com/parks-and-recreation/exclusives/ron-dancing-animated.gif