) my own 'Ultimate Edition' by combinging the O-OT and the SE, here's what I'd do:ANH
Add only minor shots here and there (modified shots of the Falon taking off, new approach to Yavin, etc.)
ESB
Even though I still see no difference whatsoever, the new Battle of Hoth
interior shots of new Cloud City (NOT the approaching Cloud City shots. Also NOT that one shot where Chewie and the gang run by Artoo where the wall is gone.)
ROTJ
Add the celebration shots, but when it comes back to the Ewoks, they still sing as ususal.
As you can see, my Ultimate Editon would only include very minor things. What the SE *should* have been from the beggining.
