i would set in the first world war, using old warplanes like spads and fokkers and so on, and it would be cool if the planes did not have rockets, self-guiding missiles, forcefields, supersonic speed, hyperdrives, tesla coils, laser guns, or other ****, just guns and bombs. the climbing rate of a plane would also be of importance, you wouldn´t be able to climb up vertically 90 degrees without the danger of stalling. but then again i am not a programmer, and i guess most players enjoy the modern weapons. aw well, forget it.