I've had time to let it marinate and this movie was GREAT. Easily, it was better than the first Avengers.
First, my gripes
1. That whole opening sequence in the snow had some horrible CGI. It was better by the time they got to the base, though.
2. Widow & Hulk - While it does make some sense, I could've gone without.
3. I wish they use field names, more.
I think it did an excellent job of showing every character's motivation. For those that are complaining about IM# Tony and AOU Tony, they are the same. Stark is a tinkerer, always trying to protect the world in the way that he sees fit. But he has an ego, so while he wants to give up the Iron Man, he currently sees it necessary until he's able to finish the next step - Ultron - a program that was created by them, but once he was given that alien sentience, it morphed their OG program. How can people not see that Ultron was a major threat? He was an AI sentient bent on annihilating the world, to make it better.
There's a lot of inclusion of the MCU as a whole. I also love how they set up the Tony vs Cap storyline. They clearly have opposing views on how to save the world, and with Tony now funding the new SHIELD, it makes sense for the Civil War. Agents of SHIELD (wish hey'd shown one of them on the HC), Agent Carter (Wudiw Training facility), the body for a sentient being already being in development by Amadeus/Helen Cho and possibly Pym, Ragnarok, Thor mentioning 4 Infinity Gems so he knows about Guardians, Klaw/Wakanda/BP. I think Ruffalo is really channeling the Bill Bixby David Banner. Banner is constantly tormented by Hulk's actions. Maybe they shoot him into space at the end of Civil War.
I love the addition of Vision, Quicksilver & Scarlet Witch, War Machine being called to the majors, Amadeus (Helen) Cho.
OH, and the team-up combos. There were more than just Thor/Cap. Does anyone have a screenshot of the new Falcon costume?