I really enjoy storytelling in all of its forms, and a largely improvised story with a buncha people and me as the narrator/NPCs could be a lot of fun. Or so I think! I have some experience in this arena, and I assure you I have more than enough time to keep things rolling along and interesting.
Here are the ideas I'd be interested in pursuing. If any spark your interest, say so in the thread, and whichever garners the most interest will get the start-up.
1.) Post-apocalyptic: We'd either tell the tale of a small town trying to hang on after the end of the world or a small band of survivors trying to make their way to a safe haven through the wastelands. What caused the end? We'll determine that in-game and in-character.
2.) Holiday themed: I have a deep, abiding love for cheesy holiday type entertainment. Since Halloween is coming up, I figure that's what most people would want to play, perhaps with a story about some kids trick-or-treating and getting more than they bargained for. (Not immediately clear on the rules about under-18s in non-adult stories, but I assure you there'd be nothing beyond some monster mashing.) Or something featuring Thanksgiving or Christmas could be fun too!
3.) Straight-up small town story: Could be period set (the U.S. in the 1940s could be fun) or could be contemporary. It would basically just be like one of those TV shows about quirky small towns.
4.) Urban fantasy: A few years back, scientists opened a gate to a universe where magic was prevalent and now it's started to leak over into our world. Players would be an elite FBI squad tasked to keep news of magic's existence quiet. Like The X-Files, but with wizards!
5.) Space opera: Players would be the crew of a small starship, tasked with seeking out alien life, etc.
But I'm willing to do just about anything. I like most genres, and I have a fairly strong familiarity with most pop culture properties. So if one of these spurs a thought on your end, let me know. Collaboration is cool!