Elf.
Love it. Quote it. Often.
For more children's oriented, I'd have to say Polar Express and How the Grinch Stole Christmas (although I like both versions, I'm a sucker for the cartoon).
Never been a huge fan of Charlie Brown. HATE Christmas Vacation. My dh LOVES it. My family loves it. They all watch it together every year. They like to irritate me.
Soft spot for Rudolph, but I'm a special ed teacher and I'll always stick up for anyone who is the butt of jokes and an outcast. Especially when he shows them at the end.