Great choices! Here are three more (32)
a) Monty Python and the Holy Grail
b) The Princess Bride
If you don't know all the lines to these two, you need to turn in your gamer card.
c) The Thing (John Carpenter version 1982, NOT the 1950's version). It had great special effects for its time, and was just well done, and I saw it when I was a little kid and my best friend, who had seen it already, knew JUST when to scare me by attacking me while the movie was on a certain scene. Great times (that bastard!

).