Number 1 with a bullet, Home Alone & its sequel (its one, single sequel). I also have this weirdo attachment to ABC Family's "Holiday in Handcuffs" even though I've only seen it twice and not for a few years, and "A Dog Named Christmas" was noteworthy. Oh, and now Gremlins. (IT IS FESTIVE.)

Incidentally, while researching this question, I added two movies to my must-see list: The Winter Stallion and The Twelve Dogs of Christmas. Both seem very exciting - and on Hulu. *fist pump*