You can tell there aren't a lot of ladies around because White Christmas is nowhere to be found.
Close for me between Christmas Carol (George C. Scott), Christmas Vacation, and Love Actually, but I guess I'll go Love Actually. So many facets of love explored: young, unrequited, forbidden, lost, parental, dude, physical, etc., throughout the Christmas season. Really pulls at the ol' heartstrings.
I think I saw Wonderful Life for the first time when I was 13-14. So depressing. Really pissed me off. "THIS is what people think is a great Christmas movie?"