Updating: You need to read this.
The two Star Wars trilogies were made around a chiastic structure, and they could well be the most experimental narrative ever attempted in cinematic history. Is George Lucas a genius? Up to you to decide, but all the while people have gone around bashing the prequel trilogy, Lucas was up to something else entirely.
The article shows in a clear and simple way how anything from the opening shots corresponds between the films in the two trilogies, to pieces of dialogue, the three act structures and in some cases even exact running time of the films - to quote the article:
"Precisely nine minutes into each film, there is a scene that takes place inside a palace throne room with a group of characters watching a holographic message." (Comparing Episode I to Episode VI).
The prequel trilogy is constructed, almost scene by scene, to rhyme in a certain way with a corresponding part in the original trilogy. The Star Wars saga is a symphony, a long poem - on screen.
What this is not NOT: A page/article that defends the quality of the dialogue/directing/storyline etc. of the prequel trilogy in any usual meaning of those words - it simply shows that everything has a reason behind it. Everything. It doesn't try to convince they're good films, just show how complex the narrative is. Contains very reasoned and well based findings, while still being accessible and easy to read.