Even though Family Matters was a spin-off of Perfect Strangers, you probably could have had Al Powell transfer to Chicago and have the same TV show (until that fucker Urkel comes along, anyway).
With that in mind, Die Hard will always be my favorite Christmas Eve tradition. Die Hard 2 is super hilarious with today's airport security measures in mind. With a Vengeance is fun and has some fun characters, but it has terrible pacing.
I'm also going to call Die Hard my favorite Christmas film almost especially because it seems to annoy all the "Die Hard is NOT a Christmas movie" people...