I think that 120 minutes is way more than enough time to fully develop a plot. Kurosawa could develop a plot in 90 minutes, and when he first started doing 90 minute features most directors were doing 45 minute double features. I think that when directors make a movie 160 minutes + they better be showing a damn good story, or else it simply isn't worth the audience's time, not to mention the trauma to the viewer's bladder! Also, I have seen some anime television series that manage to develop the plot of each episode magnificently within the 22 minute television time slot.
I didn't like the lack of plot development in episodes I and II, and I found the dialogue in Episode I to be appauling. Since many of the characters were locked in stereotypes there wasn't much room for character development. Speaking of stereotypes, the mannerisms and accents of the characters were ridiculously stereotyped, dare I say racist; Jar Jar Binx was a "Jim Crow" character, the Trade Federation diplomats were "Frogs", and Aniken Skywalker's winged slave owner was a "miserly Jew". I'm amazed Lucas wasn't wise enough to change the script he had written as a young man, especially in a main stream movie.
Personally I didn't find the special effects all that impressive, especially in Episode I. Everything that can be done with a computer can be done with analog methods, it's all a matter of the skill of the technician. The super-imposures in episode I were not done that well, though they were done very well in Episode II. I think the computer painted graphics of Episode I weren't very convincing either. One of the problems I often see with CG in movies is that the lighting is very unnatural. Perhaps I'm just picky because I'm a photographer

The violence just doesn't do it for me either. When much attention is put in special effects, I usually expect to see some gore and suffering, otherwise it just isn't real for me. With the Star Wars movies, I like to imagine to myself that since they are fighting with lasers all of the wounds are instantly cauterized, of course the real reason is that they want a PG rating

Of course, you don't need special effects to make action convincing. Highly stylized violence can sometimes be far more convincing than special effects. One example that comes to my mind is a scene in the Japanese film
Kwaidan depicting the 12th century battle of Dan-no-Ura. If we already know that the movie isn't real, what good does it do if the movie doesn't inspire our imaginations?
Now, to get to the point; yes, the star wars movies were definately entertaining enough to be worth a trip to the movies with your friends($9 a ticket and then rip-off candy later it's cheaper on DVD), are they great movies? I don't think so, but they don't have to be. If any of my opinions get you all riled up just remember that you asked for 'em
