I've read it many times, that the D200, and now the D300, challenge a photographer's technique. Can experienced-users of the D200 and D300 put into words, and expand, and explain just what that means, and why. In what areas does it challenge a photographer? What are the most common initial mistakes that a new D200/D300 user makes, until the challenge causes an improvement? What improvements in personal technique are experienced by the photographer as a result of the challenge of using these models? Can a D200/D300 just keep using these models, being ignorant of the challenges inherent in these models, and simply not rise to the challenge?