Begin with your location, are you trying to stay near a particular place? If so that will narrow your options. You can also get an officer recruiter to print you a list of Reserve officer vacancies off VMPF website to get an idea of what types of officers are needs where(reserve that is). Keep in mind that the reserve can more easily have their mission, plane or equipment changed, wheras the ANG has a governor to protect them, in theory, the latest BRACC did some damage to that theory. But the reserve has openings all over the world and seems to me to be a little more fluid. Just my opinion as a Reservist(IMA).