In my experience, enlisted soldiers that eventually go OCS and get a commission turn out either one of two ways: they either become a really great officer - or they become a really terrible officer. The odd thing is its almost always polarized like that too. Some use their enlisted experience as a foundation and learning tool to become a better officer (the good ones) - others use their commission to fulfill their own sense of power and entitlement (the bad ones).
This has been my experience as well. Mustangs tend to be really solid, or a sort of walking parody of a tinpot dictator. Fortunately the vast majority are the former.