Good post Russell The Lov.
QF is not for everyone, I think most of us realise this as there has been very little comment after someone leaves to go elsewhere.
Horses for courses!
Having said that I doubt anyone can honestly say they are 100% happy with their job, even if it was their dream job! . On balance most of us are happy enough to stay and I beleive this could probably be said for nearly all pilots in airlines.