I have to say Return of the Jedi.
Love the costumes too - Leia's Ewok dress, Luke's outfit, and the Endor camouflage are my favorites.
There are so many fun parts in the movie - and some that are even more fun when preformed by one man:
This guy is amazing - I got to see his One-Man Star Wars show and his talent blew me away. Enjoy, and hope you're all having a good week!