Just relating my experience in the Army. Had an AFB in my hometown and never seen a bigger bunch of wannabe posers in my life. If the kid wants to be a real soldier then he should join a real branch. If he wants to learn how to work on planes or keep his fingernails clean his odds are better in the AF.
Hmm, all the army and marine patients I flew out of Iraq, Afghanistan, Kuwait, Africa, etc. seemed to have a different opinion. Although it was their blood that got my fingernails dirty. Of course, quite a few of the members of the "other branches" I have worked with had a severe case of little dick syndrome and only joined to try and prove how badass they are.
The kids odds are better in the AF if he isn't a felon and can spell his own name without referencing his id card. If not, he's a perfect fit for the...well, you can decide... Miami