I would not use the word worst for any of the OT films. To me they are all great and enjoyable. ROTJ was classic entertainment, just like ANH and ESB, and it had some memeroable scenes I love too. I do agree with CO in how Lucas wrecked the film with his crap tinkering: That end Anakin spirit change makes me hot under the collar just thinking about it and like him I refuse to watch the 2004 version of ROTJ at all because of it.

Well, this is how I see it at least. Agree or disagree with me, its alright.