This is an interesting movie because we get to see Thor do battle somewhere other than Earth, and he gets to team up with Loki. There's nothing like a good Loki and Thor team-up fight. Thor is all brute strength while Loki uses his cunning and trickery. They make for some interesting combos. Plus, I'm always a fan of two characters putting aside their differences and letting the little bit of love they have for each other show. It almost makes me wish my brother wasn't attacked and killed by wolves at an early age. Almost.
After this movie you don't see much of Natalie Portman's character at all. There's not much for a geologist, or whatever she is, to do in the battle against Thanos, I guess. They don't cover the Infinity Stones at Yale.