NeverarGreat said:

In the Death Star fight between Obi-wan and Vader, there's one wide shot where they do a really fast back-and-forth. That to me looked like the most realistic depiction of a lightsaber battle. But in all three OT swordfights, there was always one participant who didn't want to end it. In the Vader/Obi-wan fight, Obi-wan didn't want to be aggressive, and it didn't look like Vader wanted to kill him. In Luke/Vader on Bespin, Vader was clearly toying with Luke. And in Return of the Jedi, neither Luke nor Vader wanted to kill the other, so I can understand why the swordfights were slower than in the prequels.

^ That right there is exactly why they were so good. Because you are able to talk about the emotions and motivations behind them, they actually meant something to you.

I'd be hard pressed to read anything about what was going on in the minds of Kenobi, Qui Gon or Maul in the Theed duel. It started, it went on for too long and it ended... that's about all I could tell you about it.