I've met loads of marines, (not at Quantico, but in places like Iraq &
Afghanistan) & found many of them charming, intelligent and sincere.

There were four officers that I met in my Air Force career that I told
"any time, any place," i.e. I would gladly serve under them anywhere.
One became the Deputy Chief of Staff of the Air Force (Gen McInerny).
Another was a Marine, more specifically, a female full bird.
Frank Reid