When I was a kid (like 13-15) I entertained the idea of going to the military. But then I saw Stanley Kubrick's film Full Metal Jacket and I deftly decided against that.

My buddy just got back from basic training in the Air Force, which I hear is the easiest of all the branches of the armed forces, and he said it sucked terribly. If you don't mind getting screamed at all the time and don't mind being made to do pushups excessively, then maybe it'll be a nice fit for ya.