I'm not sure if I'll splurge sooner or later, but I like to set up homebrew missions in the flight sims I have on hand here. It's been fun to throw the dice and add some variables into what can become an air-taxi game (dice determine time of day, passengers, weather, location, payment, maintenance costs, etc.), a rescue game, a stunt-flying game, and so on...
My son and I once tried simulating an Indiana Jones-style adventure by stealing a Ju-87 from Berlin, but the flight model for that thing was a bit too detailed and we couldn't recover from my son's urgent zoom-climb. :-) Anyway, I had fun imitating John Rhys-Davies with the soundtrack playing in the background, all the way down.
It's a great hobby, major props to Microsoft on their attention to this new effort.