I personally really like ROTJ, it’s one of my favorite SW films along with ESB, ROTS and RO.

I love the dynamics between Luke, Vader and the Emperor in the third act, and how that it’s conveyed by the cinematography and the music for those scenes. I also really enjoy the first act in Tatooine, even though I was never tol interested in the SW underworld, the film manages to make it very entertaining IMO. The only part that I think drags a little is the second act with the Ewoks, but I think that these scenes and the influence of the Ewoks in the film is not as great as some pople make them, and they can be ignored as a secondary aspect of the plot.