It's A Wonderful Life because I've always had a crush on Jimmy Stewart. Miracle on 34th Street. The Bells of Saint Marys. The Littlest Angel. Prancer. Santa Claus is coming to town. Frosty the Snowman. Sorry but I can't pick just one, I'm a Christmas junkie. I have all the Christmas movies in my list on Netflix and I am trying to watch them all by Christmas