By George Lucas film, do you just mean the ones he's directed? If so, you'll get no argument from me, but remember that that list is very small.

THX-1138
American Graffiti
Star Wars
Star Wars: Episode 1

Yes, I mean Directed (not produced), because the indicated movie (THX 1138) is a very good Auhor Film with a real Story. (kind of 1984).

It is a student film, with no means but was promising ....
(THX is interpreted by the yoiung Robert DUVALL)

I think G Lucas tok the rong way of Commercial movies and could have do better things ...(He created ILM, that is a good thing.)

Even if there are many 3D animations in the new Star Wars trilogy, that don't make it a good movie.

I can just applause the work done in the episods 4,5,6 on the side of animation ...

All was made by Hand (Many hours to have a robot movement of 10 seconds).

I noticed that many Star Wars Fans, don't even know THX 1138 movie that gave the famous sound Standard from ILM.

It's Off Topic , sorry.