National Lampoon's Christmas Vacation is my favourite Christmas film by far, I think it really shows what Christmas is like, dealing with putting up decorations and dealing with family coming over, it is such a good film, so funny too. I would reccomend it to anyone who hasn't seen it!
I also love this film. However, one thing always seemed odd to me. They seemed to have family staying at their house the entire week before Christmas. In my experience, that seems quite excessive.