Roy was awarded with the rank of Colonel, very early in his military career.
Which made him very unpopular among the higher ups.
Too young to be Colonel.
Not married.
Too ambitious.
Sly.
Clever.
Roy had chose his unit; picked people he could trust to be loyal to him and his ambitions.
Hawkeye.
Havoc.
Breda.
Falman.
Fury.
He chose them for their skills too.
Excellent marksman and technology among other things.
It was Hughes advice. To keep people he trusted to follow him close.
Pick wisely and to pick ones that would be loyal. Loyal to the end.