FSX - usually just a stock 737, or if I want to die I'll take the Extra for a spin.
Wings of Prey/Luftwaffe/BoB2 I've not played enough to have a regular.
A-10C - obviously just an A-10C, I can see some longevity in this one and have just ordered Black Shark.
@Dowly - at least you've still got your X52, I'm still on my old Sidewinder