Ironically Episode I and II are the only PT movies that I can watch without fast forwarding. No, seriously. They may not be that great of a film, but at least it is palatable most of the way through. Episode I the most. I can actually sit down and watch the whole thing and not hit the FF button.
Episode II, well there is the part with the whole Nintendo game sequence where Padme and Anakin are jumping over barrels that Donkey Kong is throwing that them in the factory. But other than that, it's not too bad.

Episode III? No. I fast forward though every scene Grevous is in. Plus any scene where Mace is in too. Basically half the movie. I can't stand it. Episode I, I could at least swallow. This movie? No. It just got worse and worse as Lucas went along.