Well, for me it would be money. I always enjoyed being deployed because of the money. While deployed I saved enough money to buy a home. I can say unashamedly I wouldn't have been half as gung-ho working for minimum wage even if Patton had been my commander.
And pesonally, I think the military is a treasure trove of great leadership. Consistency is another issue but I am having to temper my attitude on this as we face no consistent enemy. Things are evolving rapidly, a smart soldier in this day and age will make no concrete assumptions.