Well jeesz, man your standard seems to be changin from "great" movies to the classics. Many great movies from the 40's- 70's are completely lost on my generation, not because of quality issues, but progression in film. Only Legendary films can stand the test of time for that long. There are some years where you none of these films are released and others where there are a few. Saying what you think is a great movie, does not make it a classic. Instead, a widespread opinion tends to determine if a movie belongs in such a category. Personally, i think your taste is really neglectful of certain genres of film, as some of them do not require the best acting, but a good plot, production, etc. can make the movie legendary. Blazing Saddles had some pretty cheesy acting, but the movie has stood the test of time and my generation has great respect for that movie