- The opening scene, just breathtaking.
- Mystique talking German and her blue dress.
- Quicksilver, basically everything he does and says. The same goes for Nightcrawler.
- The scene in Moira's office.
- Definitely also Storm drinking coke and saying 'Welcome to the 80s' with a Kenian accent.
- Phoenix effect!
- Apocalypse using Xavier/cerebro was very scary and showed how poweful he is.
- Shirtless Angel.
- The Auschwitz scene was also very powerful, daring and uncomfortable (maybe a bit controversial, but I don't think they've 'used' or showed disrespect to the victims and its history). It worked within the story and fitted in with Magneto's background.
- Like Warhammer said, the Return of the Jedi scene.
My absolute favourite moment may be a bit underrated. It's the scene on the jet right before they reach Egypt. It's just the young mutants rather casually talking about what's to come, showing their uncertainties, asking Mystique how to deal with it. Then Mystique reminisces about Beast's and her younger days (FC), about being a hero, about using her powers and also about the friends they've lost. It's such a quiet, sad moment and JLaw did well in that scene.