I had a long career with BA and, as a junior co-pilot, took full advantage of my "apprenticeship" to learn from the senior flight crew I worked with. The majority were level-headed professionals only too glad to pass on their experience...
However
There were a couple of old school skippers who you had to watch youself with. Shouting matches with the ground staff were always a clue as to how our day was going to turn out. The good side of these poor behaviours was I very quickly learned what worked and what didn't...