Many people have come to very strongly identify with the characters of the film, even going so far as to adopt Jedi as their religion. I think there are very prominent messages that can be learned from watching these movies. That being said, I don't know who would ever choose to identify as C3PO. Where's R2 in all of this? Or Chewie?
The Queen Amidala design was definitely the most prominent one around town, and it's arguably the most eye-catching.
Me being the idiot that I am, didn't save enough time to go and check it out, but to be fair it was mostly sold out when I had the time to go.
If these stunning photos weren't enough candy for your hungry, jaded eyes, take a look at the teaser for the commercials that ran before the exhibition opened, it's equally amazing.