Come on guys get real half the movies you guys have picked really did nothing to further the genre, The movies that were picked were done so based on Storyline, Gross Income, and ticketsales

Gone with the Wind was a phenomenal movie, nothing to this day has grossed or sold more tickets ever
Casablanca, hailed as the greatest love story of our time
Wizard of Oz, first movie in history to ever use color and B&W

Those 3 movies can never be touched in terms of what they have accomplished in cinema would they be a personal favorite of mine no, not even close but you have to respect the classics, you cannot know where you are going until you know where you have been, and these movies have been there and back again.