Like Sluggo, I would like to see the scenes finished with full effects.

Specifically, I'd want more scenes from Attack of the Clones which were cut out, specifically the ones on the Lars Homestead. In the finished film, that sequence really seems edited awfully to me.

I would also like to see the scenes relating to the original fall of Anakin in ROTS, where he was motivated by many things and not just Padme. It probably would have portrayed Anakin as a less weak figure. Hopefully, there would even be a scene where Anakin suspects Obi-Wan and Padme are having an affair; I vaguely remember that there was an excised subplot like that. It was only briefly hinted on in the movie.