For me personally, I saw:
Captain America: The Winter Soldier
Avengers: Age of Ultron
Avengers: Infinity War
Ant-Man and the Wasp
Captain Marvel (OW, MY EYES!!!!)
Avengers: Endgame
Spider-Man: Far from Home
I was invited to Black Widow, but I didn't see it because in my opinion, the quality of the MCU has been going down. Years ago, I didn't like Marvel movies because they took themselves too seriously. But nowadays, they don't take themselves seriously enough. I'm referring to all the jokes that ruin the drama. I'll probably watch the new movies once they're free on Disney+, and that's assuming I'm even interested.
Which movies did you see in the theater, and which ones are you planning to see?
And if you're wondering why there's gaps in between viewings on my list, there's two reasons for that. Early on, I wasn't invited by the family members that did go. Later on in around 2017, I stopped caring. My interest sort of came back after seeing Endgame, which was an epic experience, by the way.