Don't want to just mindlessly hate on the prequels, but I've been watching Star Wars again and I think I prefer the lightsaber battles in the original trilogy, despite their being less impressive technically. Prequel duels are seemingly all flashy choreography and jumping about*; Luke vs. Vader in Empire and Jedi are a lot more raw and savage. Not as much needless twirling.
*I'll give Windu/Palpatine a pass for getting to the point quickly, and Obi-Wan vs. Anakin gets one just for the pure hate involved.