As always, it's the needs of the service before what you want. Any job in any service could have you pulling convoy duty in the Middle East.
Like Elfie said, everything you do in basic has a purpose. The tiniest dumbest things tend to be the most meaningful, and when you get into the field you'll realize that it was really good that they taught you that. It's an awesome life changing experience and for the most part, your success depends on you!