All the ones listed here - It's a wonderful life, Home Alone I and II, Elf, Christmas Vacation, The Santa Clause, The Grinch (classic cartoon and Jim Carrey) I've watched everything but It's a wonderful life this season. I always save that for close to Christmas and will probably watch it this weekend
Elf and Office Christmas Party were fun to watch too. Haven't seen Home Alone in a while. Maybe i'll re-watch it one day.
My aunt and I love watching The Bad Seed, the original. It has nothing to do with Christmas, it's just kind of our way of rebelling.