Die Hard is one of my favourite movies, so of course it's only natural that it's one of my favourite Christmas movies as well and always a great movie to start the Christmas season off with. It's one of those movies where the time of year has nothing to do with the plot (I mean, offices can have a multitude of excuses to have parties that Germans can break into), but the fact that they chose to set it during Christmas is genius. Remember how clever everyone thought when Tim Burton juxtaposed Christmas with something sinister in The Nightmare Before Christmas? Well Die Hard did it first! Then of course it's also just a great example of a near-perfect action movie (the amount you like this movie is directly proportional to how much you enjoy Alan Rickman's overacting).
Oh Alan, we <3 you. Anyway, this is a great Christmas movie and if you haven't seen it yet, 'tis the season (mother fucker!).