Speaking in terms of Magic's personality archetypes, I'm a Johnny. That means that I enjoy building as much as playing. Playing the game is just an extension of the building process for me, and if I didn't build it from the ground up, it just doesn't feel right.
However, I might be willing to GM a game if it looks very promising, or is early on in the story. So... if you've building a list of possible Game Rescuers, you may as well add me as a tentative member.