I love the scene on Dagobah with Yoda's death and Luke talking to Obi-Wan. Again, Obi-Wan there gives me a very warm feeling. I truly care about the characters, and basically the Endor scenes are all about the characters im my eyes, with the Ewoks there to basically advance the plot to the final battle.
After his absence in ANH and the brief holo appearance in ESB, the Emperor does not dissapoit in ROTJ. What a great character, and all scenes with him are awesome.
I truly believe that ROTJ is more about the characters than the actual war (for most of the movie). That's why it was originally ended the way it was, with the characters together. Now, with the celebration crap thrown in there, it loses some of that (and of course the Anakin switch, but to each his own).