Re: Tom Hiddleston: Loki Redux - Part 1
In Loki's case he seems to dress up in finery, so to speak, when he's projecting power; he aims to be king, and when he morphs on to that armour with his helmet, it's to show what he thinks is what he's meant to be. "Look at me, I'm your ruler (or at least, I mean to be)." That's not exactly what Thor is about, so from that perspective it's logical why he's not wearing his much.
As far as I can remember, Odin didn't make him king, though he tells him he will be a good one. I always assumed they had come to some sort of agreement there, that Odin would keep being king for now, but Thor would become king eventually, just as it had always been. Thor had learned his lesson and knew he still had much to learn. He didn't have to become king at that point either since Odin's powers were restored. If he's not king, well, it seems there is no winged helmet either. Much, anyway. Ceremonies I guess. Let's hope we'll get some of those then.