I don't have a lot of favorite Marvel films that were actually produced by Marvel (as opposed to Fox or Sony). But here's a small list. Everything beneath #3 is more like "kinda like" rather than "favorite:
- Spider-Man 2
- Captain America: The Winter Soldier
- Black Panther (2018)
- Spider-Man (2002)
- Captain America: The First Avenger
- The Avengers (2012)
- Iron Man (2008)
- X-Men (2000)
- Captain America: Civil War
- Fantastic Four (2005)
That last one is a guilty pleasure. lol