At my Toys R Us, they were instructing people to only take two of each piece and one head. They also had some of the pieces that looked similar mixed together, such as the round grey plates. So when I got home, I realized that I didn't really have enough pieces to do much with all of the ball joints and I only had one of the grey piece that snaps into the black turntable. But hey, I decided that it's really in the spirit of the movie to make something cool with what you have (and the robot-person thing doesn't make a ton of sense to me anyway), so I made a spaceship!
I used every single piece I got at Toys R Us, with the only outside additions being the steering wheel and the pilot. My only rules for myself were to use everything and to try and keep it symmetrical if I could (since, as I mentioned, I didn't actually end up with two of everything). I'm usually a "follow the instructions" kind of person, so I'm really pretty proud of this.
What did everybody else come up with?