Even though Thanos is the Villain, for some strange reason I felt sorry for him, it was almost as if 'why do I have to do this, I'm going to lose more here than everyone else' attitude. He did sacrifice Gamorra & his black order to get the stones after all.
The Hulk refusing to 'appear' after his severe slapping by Thanos. A bit like a kid refusing to go to school for the first time.
When each time Thanos put a stone in the gauntlet it reminded me of this:
I couldn't help but think that the whole film with snippets of here & here was like an episode of Game of Thrones, with each snippet with the marvel character in it was a smaller version of their film.