DuracellEnergizer said:

A likeable Anakin.

Better villains.

Consistency with the good portions of the EU.

Consistency with the OT.

Good dialogue.

Less "black hat" villains.

Less Jedi who are aloof ubermensch.

Less "white hat" heroes.

Little to no emphasis on the Jedi-Sith dichotomy.

More prominent female characters.

More Jedi who are human ("Human" as in having human thoughts, feelings, and flaws, not biologically human.).

More lightsaber colours.

No Artoo.

No Chosen One prophecy.

No Darths other than Vader.

No Hayden Christensen.

No Jabba.

No Jango.

No Jar Jar.

No midi-chlorians.

No mini-Jango.

No Natalie Portman.

No Order 66.

No Padme.

No Palpatine with a lightsaber.

No Qui-Gon (not as Ben's master, anyway).

No ridiculous universe shrinkage (Anakin building Threepio, Yoda knowing Chewie, etc.).

No stupid made up terms like "padawan" and "youngling".

No Temuera Morrison clone troopers.

No Threepio.

No virgin birth.

No Yoda.

No Yoda with a lightsaber.

I think it would be easier to just erase the prequels from existence :D