@Nightfury KatWell, since the GM only has limited intent, and you are always open and recruiting, you are describing to me a BYOA (Bring Your Own Adventure.) Super easy to manage as a GM, and you can get involved in any plots that interest you. Unfortunately I am not really looking to tell the story of a character, I am looking to play a character in another person's story. Have fun though.
I'm going to go ahead and make a character and show interest even if you guys are full up... just in case you have a no-show. That is how totally diehard into roleplaying I am and I think your game is the perfect mix for me.