When rearing / bringing on a young dog, one of the most important natural traits I hope he / she has is - a good recovery rate.
(Now I am talking way before any man work has commenced).
An indication of this can be observed as early as circa six months.
For instance, if you have sternly administered a correction. (Ideally physical) I personally grab them by the scruff, press down and growl at them.
Then gauge therre reaction to an instant recall, heel/sit.
Observe the speed at which they take position/eye contact/general demure.
If they have instantly bounced back - IMO they have just demonstrated a vital natural trait, which is rarely discussed, and which IMO, very much increases there chances of becoming a very good working dog.