A while back, I rounded up some of the most cheer-worthy movie moments, and y'all had a LOT of Marvel submissions — enough to make its own list!
Below are 50 Marvel moments people remember audience members cheering at, ranked from "moderately exciting" to "literally changed my life." The submissions are (mostly) from y'all, but the ranking? That's all me.
OH, and before we go on, spoilers ahead! This list includes MCU movies up to Spider-Man: No Way Home.
50. The female Avengers team-up in Avengers: Endgame:

49. When the old man stood up to Loki in The Avengers:

48. When Yondu got a Ravager funeral in Guardians of the Galaxy Vol. 2:
47. When the tech refused to launch the ships because Cap told him not to in Captain America: The Winter Soldier:

46. When Steven defeated Dormammu in Doctor Strange:

45. When Tony showed up in the end credits of The Incredible Hulk:

44. When Fury revealed his damaged eye and used it for the retinal scan in Captain America: The Winter Soldier:

43. When Druig knocked Sprite out in The Eternals:

42. When Venom recognized Peter in the post-credits scene for Venom: Let There Be Carnage (This is Sony, but I’m counting it as the scene takes place in the MCU):

41. When Norman said, 'I'm something of a scientist myself' in Spider-Man: No Way Home (a reference, of course, to his oft-memed line from Spider-Man):

40. When Hulk said 'Hulk smash' and beat Abomination in The Incredible Hulk:

39. When the Guardians held hands and withstood the Power Stone in Guardians of the Galaxy:
38. When Loki arrived with the ship in Thor: Ragnarok:

37. When Peter pushed his way out of the rubble without his suit in Spider-Man: Homecoming:
36. When Hulk slammed Loki in The Avengers:
35. When Daredevil showed up in Spider-Man: No Way Home:

34. When Steve first came out of the machine in Captain America: The First Avenger:
33. When Wanda fought Thanos in Avengers: Endgame:

32. When Thor summoned BOTH the Mjolnir and Stormbreaker in Avengers: Endgame:
31. When Okoye said she would kill W'Kabi for Wakanda "without question" in Black Panther:

30. When Cap gave Sam his shield in Avengers: Endgame:

29. When T'Challa revealed himself to be alive to Wakanda/Killmonger in Black Panther:
28. When Peter saw through Mysterio's illusion and stopped him from shooting him in the head in Spider-Man: Far from Home:

27. When Tony got control of the Infinity Gauntlet in Avengers: Endgame:
26. When Carol flew through Thanos's ship in Avengers: Endgame:
25. When Carol got up again in Captain Marvel and it flashed back to all the times she got back up again after falling in her life:

24. When Natasha broke her nose to sever Dreykov's control over her in Black Widow:
23. When Natasha utterly dominated in this Iron Man 2 scene:
22. When Yon-Rogg tried to bait Carol into fighting him without her powers and Carol said she had nothing to prove to him in Captain Marvel:

21. When Natasha and Okoye came to Wanda's rescue in Avengers: Infinity War:

20. When Shang-Chi got control of half the rings in Shang-Chi and the Legend of the Ten Rings:
19. When Bruce revealed his "secret" in The Avengers and turned into the Hulk:
18. When T'Challa yelled "WAKANDA FOREVER!" and fought with the Wakandans and Avengers in Avengers: Infinity War:
17. When Harry Styles/Starfox showed up in the post-credits scene for The Eternals:

16. When Doc Oc showed up in Spider-Man: No Way Home:

15. And when Goblin's laugh started and he showed up in No Way Home:
14. When the Jabari showed up to help T'Challa's supporters in Black Panther:

13. When Tony finally saw Peter again and hugged him in Avengers: Endgame:

12. When Steve, Nat and Sam made their entrances in Avengers: Infinity War:

11. When Thor showed up in Wakanda in Avengers: Infinity War with his axe:
10. When Thor summoned lightning with no hammer in Thor: Ragnarok:

9. When the original six Avengers all assembled for the first time:
8. When Hulk showed up in Thor: Ragnarok:

7. When all three Spider-Men swung together in Spider-Man: No Way Home:

6. When Cap said, "Avengers, assemble," in Avengers: Endgame:
5. When Steve recognized Bucky in Captain America: The Winter Soldier:

4. When Cap got control of Mjölnir in Avengers: Endgame:
3. When Tony revealed himself to be Iron Man at the very end of Iron Man:
2. When Andrew's Peter Parker (and, to a lesser extent, Tobey's) showed up in Spider-Man: No Way Home:

1. When everyone came through the portals in Avengers: Endgame:
