I'm only a PPL at the moment and I'm wondering what makes someone a 'bad' pedantic?
I had two instructors, one who would brief me superbly, talk me through all aspects of the flight. The other would tell me to jump into the plane, let me get on with it and then bollock me when I made a mistake - then explain it!
I certainly preferred the 'pedantic' approach, where everything was spelled out prior to the flight.