I'm curious. Me, a few years ago when I was 15 (only less than a year after I seriously got into TF), I had a nice little collection of Armada figures. But when I played with them and was making my own story, I would substitute the lack of a character with something else, usually creating a whole new character. I did this with a few Power Ranger toys. Such as the Shogan Megazord, I used a couple of the figures (since I was missing most of them) as non-transforming Cybertronians, one smaller Ranger figure as a human in a spacesuit, and even Artillatron as Omega Supreme. And my favorite of all was Ninjor, who I got the rereleased (Ninja Storm?) remold of, and actually created a character out of him - Ninjakon, the brother of Unicron. Who of us has used other robots to substitute TF's?