Interesting that while few rank The Phantom Menace as their favorite, more rank it as their favorite than either of the following 2. It's been awhile since I've watched any of them, but Phantom was a clear least favorite for me. (Maybe some people started with that one and didn't like it enough to continue, making it their favorite by default. Or some kids really thought Jar Jar was funny). Also, there seems to be a pretty sizable group of people who saw Empire but not the original Star Wars. I don't think you have to be a stickler for natural progression to consider that really strange.
Demented and sad, but social, right?