The first was a classic. "I don't know why they call this stuff Hamburger Helper, it does fine all by itself."
European Vacation was not all that good, Vegas Vacation was much better, plus the daughter was a little hottie.
But my all time favorite has got to be Christmas Vacation.
"Where do you think you're going? Nobody's leaving. Nobody's walking out on this fun, old-fashioned family Christmas. No, no! We're all in this together. This is a full-blown, four-alarm holiday emergency here! We're gonna press on, and we're gonna have the hap, hap, happiest Christmas since Bing Crosby tap-danced with Danny fucking Kaye! And when Santa squeezes his fat white ass down that chimney tonight, he's gonna find the jolliest bunch of assholes this side of the nuthouse!"