In No Particular Order:
National Lampoon's Christmas Vacation
(This one always gets me in the Holiday spirit)
(There's one scene where the mom is baking cookies when she gets attacked by gremlins... When I was little, I always wished i could taste those wasted cookies. I wouldn't have minded a mogwai either)
(Okay, maybe this movie doesn't really bring me holiday cheer, but i do think of this scene occassionally because it always cracked me up how angry Bateman looked)
I didn't feel i needed to add any of the classic obvious choices...
What are your favorite holiday movies?