Having, or being, the MacGuffin doesn't make you the main character. You can also be a main character, instead of the main character in an RPG, in fact that would make it a more typical RPG for most of the pen and paper players. I feel like we're just continuing a discussion here, that we had over in the "amount of companions" thread. Which of course was had a lot in common with the many 'Origin Characters' threads.