We can not neglect the richness of character development that the Starwars universe has created. Regularly you can find books, comics and even shitto movies that stem from the Starwars universe.

Let's use for example everyone's favorite robot R2D2. R2D2 is a robot character that has no facial expression. You'd think there is no way for such a vacuum to have any personality. That's not the case. R2D2 is a character that is full of personality. And so he has made regular appearances in all of the Starwars films as a regularly seen character.

Courtesy of Lucasfilm visual imaging on screen has been revolutionary. From movie to movie the company under George Lucas has made every attempt possible to advance their special effects.

Not to be forgotten either is what has been accomplished with sound. The familiar Starwars sounds that we hear can all be traced back to ordinary day to day sounds that have been modified. Pure genius!