A hasty conjecture about the differences between novice and expert players.
From my limited experience, it seems that these two types of people play for different reasons in different ways. Novices seem to take a relaxed approach, enjoying the game as entertainment. Experts, on the other hand, play much more passionately. While they doubtless take much enjoyment from the game, the speed, ease, and prestige with which the beat the game become extremely important as a way to indicate social standing among other experts. Since the goals of game play differ, so do the methods. Novices are less worried with how quickly they beat the game (and may not even care about beating it at all) while experts attempt to conquer the game as quickly as possible.