Two of the expressions we used in recruiting were:
The Navy will make you or it will break you. That is a very serious risk to take to become "a man."
Another thing we used to tell (to people we liked) "There are only 2 types of people in the Navy, those who use the navy, and those who get used by it.
It takes a lot of effort to be the former and without it, you will definately be the later."
Don't know about the other services, but I can't see it being any different.
In my opinion, the military is not the place for the undecided. They usually are the ones with the most or only negative things to say about it.
You do not join the military to be in EMS, Fire, Law enforcement, electronics or any other thing. You join the Navy to be a sailor. You join the Army to be a soldier. You join the Marines to be a marine. The Airforce to be an airman. It is unwise to think that you will simply hold a civillian position "somewhere else."