Definately one of my all time favourite movies has to be Monty Python and the Holy Grail (1975). I have seen it so many times, I practically know it by hard. Why is it so much easier to memorise movies then, for instance, math formulas?
"Listen. Strange women lying in ponds distributing swords is no basis for a system of government. Supreme executive power derives from a Mandate from the masses, not from some farcical aquatic ceremony." - "Be quiet!" - "Well, but you can't expect to wield supreme executive power just 'cause some watery tart threw a sword at you!"
"Well, on second thought, let's not go to Camelot. It is a silly place."
"Please! Please! This is supposed to be a happy occasion! Let's not bicker and argue about who killed who. We are here today to witness the union of two young people in the joyful bond of the holy wedlock. Unfortunately, one of them, my son Herbert, has just fallen to his death. But I don't want to think I've not lost a son, so much as... gained a daughter!" - "For, since the tragic death of her Father" - "He's not quite dead!"- "Since the near fatal wounding of her Father" - "He's getting better!" - "For, since her own Father, who, when he seemed about to recover, suddenly felt the icy hand of death upon him. And I want his only daughter to look upon me as her Old dad, in a very real and legally binding sense. And I feel sure that the merger-- er, the union between the Princess and the brave, but dangerous, Sir Launcelot of Camelot."
You can also check out the complete script online.