I would put my likes into 2 categories -- one for the original series, and one for the SE. That is, I would always want to have the option of watching the original or the SE with certain changes:

Original Trilogy:

Just the cleanup, please. No changes other than addressing color and picture quality.

SE IV Likes:

New X-Wing Treatments on Yavin
Obi-Wan's House
Desert Treatments with 3PO and R2
Jawa Improvements
Falcon takeoff from Mos Eisley
Death Star Battle Updates (except the ring around explosion)

SE V Likes:

Hoth Monster Updates
Cloud City Updates

SE VI Likes:

Cleanup of all Death Star Scenes
Sarlak Updates
Bantha Herd
Ewok Celebration and Song with ORIGINAL Spirits...

Things to delete with expreme prejudice:

Greedo Scene/Redone Cantina
Jabba Scene with Han
Stupid CGI creatures running around and distracting me (all 3 movies)
Stormtroopers on lizards
Crappy Pacing/Dialogue Changes after Luke/Darth Lightsaber fight in Empire
Redone Song in Jabba's Palace
Hayden with the Spirits