Honestly, I will say this --
The action is kinda better in the prequels. The fight scenes feel more dramatic, and some of the sillier parts actually make sense because, well, it's basically high speed feinting and counter feinting. Feinting is a useful tactic in sword fighting, especially when your swords are capable of cutting through flesh like a hot knife through better.
Though at the same time, the original trilogy's sword-fighting was more suspenseful, more thoughtful, and more like two samurai dueling. So they both have their upsides and downsides really.
I hated it when Lucas decided to make the Dark Side less ambiguous, though. The Dark Side is awesome and more overt, and negative emotions and energy isn't always a bad thing. But no, anyone who uses the Dark Side is automatically evil, apparently.
Pity because the Grey Jedi sounded like they were interesting.