The necessities.

Here are the movies I HAVE to watch at Christmastime each year, or it ain't Christmas:
Christmas Vacation
White Christmas
A Christmas Story
Scrooged
How the Grinch Stole Christmas (the cartoon, not the Jim Carrey one)

Bonus Props go to:
Elf
Bad Santa
Rudolph the Red Nosed Reindeer
Home Alone
(they aren't necessities, per se. But I try to watch these too.

How about you?