Honestly, after the first two parts I really did not expect much to happen, but *dreamy sigh* it blew me away.
I was hooked till the very end, from the corny plus great jokes and Loki's ever changing personality to Hulk's huge muscles and equally huge innocence.
BUT the most beautiful part of the movie, in my opinion, was Hela. That's all I have to say about her role, which was as close to the perfect female fantasy villain as one can get.
It's worth watching again and again, but if you're running short on time then at least give it a single watch. Even if it might not be your genre, but please do give it a watch.
Who knows, maybe it'll drag you in our marvel fandom.