Mikey's Christmas Carol is a classic at my house too. And yes, the grainy VHS taped off of the Disney Channel version
Along with that for me its:
A Christmas Story
Miracle on 43th Street (original)
It's A Wonderful Life
Love Actually (this is a new one, but it's such a great movie)
And the Christmas Trilogy: Charlie Brown Christmas, How the Grinch Stole Christmas and Rudolph the Rednosed Reindeer.