Dude, you're talking about dropping a contract for a good-paying, exciting rewarding job because you might not get exactly what you want. And you expect that the Navy, AF, Canadian Coast Guard, whatever, will see that as a reasonable rationale and pick you up? Because...what, they sense your awesomeness?
All the services are shedding people right now and the job market for young 'uns fresh out of college sucks...they can afford to be picky. I can very easily see a selection board looking at your application, seeing it as "quits if he doesn't get his way" (I don't give a shit if that's not how you see it, and neither will they), and immediately tossing you in the "no" pile. And then you can spend your working days explaining to your fellow baristas how you could have been a Marine NFO, but it wasn't 'first-team' enough for you.
All the services are shedding people right now and the job market for young 'uns fresh out of college sucks...they can afford to be picky. I can very easily see a selection board looking at your application, seeing it as "quits if he doesn't get his way" (I don't give a shit if that's not how you see it, and neither will they), and immediately tossing you in the "no" pile. And then you can spend your working days explaining to your fellow baristas how you could have been a Marine NFO, but it wasn't 'first-team' enough for you.