So many! My kids are at the age where they love to watch the different Christmas movies with my wife and I, so we cycle through a different 1-2 each weekend (movies / screens are only a weekend thing in our home). Thus far, we've watched:
Elf, The Santa Claus (1994 Tim Allen version), The Grinch (original cartoon version), Charlie Brown Christmas (a few times, actually), Muppet Christmas Carol (my all-time favorite), and maybe another 1-2 that are slipping my mind.
Still need to watch "Home Alone" (might let my 7-year-old watch with us, but not sure on that...thoughts?), "A Christmas Story," and "Christmas Vacation" (I have a feeling I'll be watching that one by myself on the airplane during our Christmas day travels, as my wife doesn't find it as funny as I do), and maybe some other random ones that may come up.
Recommendations?