Well, here's how I see it: there are quite a few scenes in ROTJ (like Luke fighting Vader... especially the part where the music kicks in) that I like more than any other scene in any of the SW flicks.
However, as a whole, as a 2+ hour long movie watching experience - it's just not as good as 'Wars and Empire. Those two seem much better constructed and, in the end, satisfying.
That being said - I still love ROTJ. I just love it.