What struck me as odd about this movie is that its choice to have the character's origin reconstructed over the course of the movie, rather than being presented in a linear way, didn't have the impact that I would have expected.
It's an interesting idea, but I still didn't feel all that differently about this movie as an origin story than I have about a lot of origin stories, like Doctor Strange, for example. At least not on the initial viewing. I will have to keep an eye on this question when I see it again.
I was reminded somewhat of the first Thor movie, because of the starkly contrasting tones. We start out in space, then the character arrives on earth, it feels like a completely different movie, almost like a buddy movie for a while, and then there is the finale back in space. A much more impressive finale than in Thor, but it's a somewhat similar progression.
Anyway, it was a lot of fun, and everybody I saw the movie with seemed to like it even more than I did, which is a good sign.