NONE!, lol cross into the blue, especially if you want to work on planes. if you like working on planes in the desert for years at a time then Marines is for you.
but really, fight for what you want, don't let recruiters push you around.
he's right. go air force. you are GUARNTEED a job. and WON'T get switched to something else like the army or marines will do. i've seen it and heard it. most army guys i've met hate their life. go air force. you won't be dissapointed.