All new ideas seconded!
I especially like the "me" one. However, if that was the choice, I would probably only do one submission ("Me" in a mask is cheating IMO). Leia has the same problem. This wouldn't affect anyone that only does 1 submission but people like Mousedroid that makes lots each contest may find this one a little boring. In the gripping hand though, one can make figures without having to enter them in a contest, and can also make Leia or "me" as part of a team.
A fun idea might be to make something based off of a completely different SW "thing" and let us guess what the original object was that inspired.
For example, an alien's head that was inspired from the shape of an X wing.