I'm sorry n77 but "courtesy" ! Please! As a commander do you really feel it necessary to demonstrate how big an ego you have. How magnificently magnanimous of you. To courteously allow your FO to make the odd decision here or there must make your day.
To watch a keen FO develop from an inexperienced pilot who is not only a danger to himself, but to others as well. Into an excellent forward thinking, situationally aware professional, is greatly assisted by enlightened commanders forcing sometimes rather reticent FO's into decision making. As I said before you always have the power of veto. Use it when necessary and explain why. Wisdom after all comes with experience, grasshopper !
