Watching films is a classroom in itself, yet you really have to have the right tools to become a critical viewer. All good directors are students of film. They devour film, looking at the way their peers chose to present the script - their shot choice, transitions, music and form.
The question of "Mac vs. PC" has started holy wars on computer forums. It also led to the notion of platform bigotry, the condition where people are so gung-ho about their platform of choice that they actively disparage anyone who doesn't use it. (This also causes certain users to blindly accuse publications of being biased against a certain platform, even though four out of five current Videomaker editors happen to be invested in both platforms.)