I will throw some petrol on the fire -
Of the ex-airforce crew that I flew with (maybe I had a bad run or it could just be me,) the worst of characters were the ex trash hauler 'white glove' brigade, closely followed by the ex-RAF non flyers (one ex eng gives me nightmares) who got out and then started flying.
Generally insecure
with big chips, big egos, and piss poor handling skills and matching PQs.
Taught me a lot about what not to try and emulate.
With the occasional exception.
The ex-fj and even the navy guys always seemed to be relaxed because they had nothing to prove and their CRM skills were better because it was new to them and they had to try harder....