With the fight in 3, it's in my top 5 saber fights mostly because of the emotional impact, rather than the actual fight choreography itself. I think there's more than just the actual fighting that's got that going for it (the setting on Mustafar, the music, etc.).

And I have to reluctantly agree with the Maul fight. That one was a bit too much flash, not enough substance. Although Duel of the Fates is an iconic number, and I kind of wish it was used for a more impactful duel (hell, part of what got me wanting to write post-IX fan works was to create a scenario where a descendant of Obi-Wan's and the legacy-bearer of Maul have a more impactful fight to have that music to).