So ive decided that i want to join the service. But now my big question is, what is different about the army, navy, air force, and marines? which one is right for me? Whats the difference between the people in each? The boot camp? The, i guess its called 'mos' choices?(could someone explain more about the MOS too?) Which is more technical? I would like to decide soon and get the ball rolling. And what happens after i choose? At what point do i sign my life away? and just some information about me; Im 18, 5'11", 170 pounds (although i dont know where that weight is, im not fat nor buff ), born in america, part korean, raised a hick . No health problems known. Never done drugs of any kind. Never drank. No police involvement. Never even smoked a cigarrette. Clean driving record. Need any other info just ask. Thanks!