the ability to move beyond your comfort zone, and be ok with it. to open up to new friends of all backgrounds. to understand that answers to questions can come from anyone in the group. to simply "try it".
to deal with adversity. its hot, you're stuck in bumble stink kansas, the showers don't all work, you've got a clinic to play, and a show to perform tonight. just go to work. make it happen and make it good. that's what its about. push, deal, and overcome. anything less than 100% is unacceptable. Because this is the (insert corps name).
you didn't think you could do it, but you could. which means later in life when you come upon a barrier you don't think you can overcome... you will. because you remember that one time in kansas, when EVERYTHING sucked. And you got through it. You found a way to work as a team, to make it to the show, to make that crowd stand on their feet, and later on, when the bus broke down and you had to pile everyone onto the other busses and trucks and again... EVERYTHING sucked for that time being... you got through it. And you'll remember it, and apply that mentality later on in life.
There's no "I can't do that". There's only "I'll find a way to do that".