I still love the movies because they have that rare combination: They are fun movies yet they are still very good movies in a movie sense. Most fun movies usually are 'guilty pleasures' which are not the best made movies in the world, really have no drama, and lack the depth in the overall story, so they are usually just summer action movies you rent and enjoy and never watch it again until it comes on cable. Most quality movies like Schindlers List, Raging Bull, and Platoon don't have that much replay value because you have to be in the mood to watch them cause they are so dramatic.
The OOT movies have that perfect blend everytime you watch them of humor as in Luke, Leia, and Han in the deathstar in SW, drama as Lukes stares at the Binary Sunset, Mythology as Kenobi explains to Luke about the force and his fathers lightsaber, and depth as Vader reveals himself as Lukes father in ESB. But they still possess an overall enjoyable, fun experience for 2 hours cause you have 3 realistic good guys to cheer for and with the combination of constant action, great effects, and awesome music, to me you have the perfect movie experience. The OOT movies are not the best movies of all-time, but they are still my 3 favorites.