Just got back from the movie. I enjoyed it and it for the most part was well done, but it did feel like it was going through the motions a bit for me. It's not saying it was bad, as it definitely had some moments, but overall, it didn't engage me that much. The humor is still pretty much hit or miss but that's most of the Marvel films.
The Captain America cameo was the most memorable part of the film.
I still easily give Thor at least a B