When Tony saw Peter again that was pure joy to watch, Tony dying yea I will admit I cried I may be a grown man but there were tears, also there were 3 girls sitting next to me and they were sobbing their hearts out over that scene that didn't make it any easier for me.
As for Thor, I had no problem with how he was, he was wallowing in self pity he knew he was the reason for the snap, and so he just shut himself away and drank and ate to make himself feel better, he explains it to his mother saying he cut his head off but he knew it was a worthless act as there was nothing that at the time could be done to erase what had happened he really just needed someone to talk to to let it all out, as for leaving Asgard yea I can see that after the events he still feels lost and has no real purpose, he doesn't really want to rule as he is really more about the action so giving Valkyrie the Throne make sense as he knows she will do a better job than him.
They did such a good job of bringing everyone back and filming scenes from alternate angles.
Seeing Cap use Mjolnir was awesome to see and that final fight just damn, in the end we lost 4 people, Loki, Vision, Natasha (booo) and Tony (inevitable but boooooooooooooooooooo)