Setting myself up for ridicule here, but what the heck. If we're talking favorite, as in "I can only watch one MCU film for the rest of my life", I'm going with Incredible Hulk ('08). The Hulk is my guy, and as a film I think that this (and Iron Man '08) came closest to capturing the spirit of the comics of my youth.
Ain't no shame in my game.
Ain't no shame in my game.
I love The Hulk but...