I personally love "A Clockwork Orange" and "There Will Be Blood".
I've always loved To Kill a Mockingbird.
I'm not sure I can explain why. I think it must be the innocence of Scout, Gem, Dill played against the seriousness of the trial and prejudice and hatred that surrounded it.
Had this question last week, my answer is still the same.........”In the Heat of the Night”, Sydney Poitier and Rod Steiger. It is about racial tensions in the deep south and how hard it was for a white southern cop to take help from a black cop from Philadelphia in order to solve a murder.