The practical effects and animation of the OT hold up well today, while the CG jizzfest of the PT looks horribly outdated. There's a reason TFA used more practical effects over CG- it just looks better.
Some of the things that Phantom Menace had going for it:
-Darth Maul
-The Pod Race
-The final QGJ/OWK/Darth Maul battle
What Attack of the Clones had going for it:
-Hmmm… less Jar Jar? I honestly can't recall anything memorable happening in Ep 2.
What Revenge of the Sith had going for it:
Everything, minus a few quibbles. The dialogue was as forgettable as the rest of the PT and the character development was laughable.
I rank RotS as the strongest of the PT, which makes it on par with the weakest of the OT (RotJ).