I was fine with Loki telling Thor of Odin's "death" being the catalyst to change him, but again, it just happened too fast. We saw him work through grief for a few seconds, that was about it. And I would have liked it if Portman's character had a bigger hand in teaching him how to be humble. I mean, Loki attribute's the reason to her, but we never really see a reason why Thor falls in love with her, or how he learned to be humble from her.
I would have liked just a bit more character building scenes with that. But still, even with what we got, it was still very enjoyable.