Dr. Strangelove is one of the greatest films of all time. I did an essay for my Comp/Lit class on why Armageddon is one of the worst movies of all time. But there are too many to pick from.
'Try everything once, except incest and folk dancing'- Sir Thomas Beecham
'What fun is it being cool if you can't wear a sombrero?' - Hobbes
'When you smoke herb it reveals you to yourself.'