I've had some pretty epic crashes that were definitely worth the rebuild. And, as far as combat goes, I have a friend who I fly with and no matter what we are flying, if we are both in the air at the same time, its going to become combat. It just happens. The feeling from a series of successful flights would be diminished if there were no crashes. Its all part of the game. Besides, no great story ends with, "and then I landed safely."