I think my favorite is 'The Ref' with Denis Leary, Judy Davis and Kevin Spacey! Leary plays a thief who tried to rob this house, ends up holding Davis and Spacey hostage in their house... on Christmas Eve! Of course the couple is close to divorce, their family is on their way for Christmas, etc, etc. Very funny!
I also love A Charlie Brown Christmas, and the animated oldies. :)
And a White Christmas, of course, and I have sat through manby marathons of A Christmas Story, i love the scene when the dad wins his 'Fragile' prize!(and the scene when his wife breaks it accidentally on purpose!) LOL