I didn't have to have an interest in the military.
I came home one day and announced that I'd quit high school; my dad threw my in the car and dumped me at the Recruiters, saying "make your own way home." Five weeks later I was in Cornwallis (recruiting timelines were apparently magical back then )
Yes, he was, but it still meant that my grandfather at 17 had to read the telegram about his going missing to his mother. He cited that telegram as the reason he eventually became a pacifist (and the reason why he went to enlist).
The funny thing is, essentially the only reason why he got caught is that the recruiting station he went to.... was manned by the principal of his high school.
I've always been interested in military history, video games, novels, all that jazz, and I've always had an inkling that I would be interested in joining the military, but in my school years I was completely out of shape. In the last year I have shed a bunch of weight and with me not being sure what I want to do with my life, the military seems like a good option now. Serve my country and find out where I want to go in life and all that jazz.