I would vote "How the Grinch Stole Christmas" and "A Christmas Story" as my two favourite, followed distantly by "A Miracle on 34th Street". I am also perhaps the only adult in the world that thinks "Home Alone" remains hilarious, and as it is vaguely Christmas related, worthy of mention.

Favorite Christmas movie? That's easy: Bad Santa.

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Heh. Freakin' Ben Stiller. :p

For me, probably Bad Santa.

National Lampoons Christmas Vacation

hmmmm, perhaps Home alone, I'm not into xmas movies.