Peace on Earth. Goodwill toward men (and women). Family. Traditions, old and new. Appreciating who and what you have in your life. Generosity. The way a face can light up when someone opens the perfect gift and realizes that you put real thought and care into picking it.
It's not about presents, but it is. It's about giving them; the getting is an unavoidable consequence. And it's not (in my family) about a single birth two millennia ago. It's all the other holidays rolled into one. The sense of gratitude and appreciation that Thanksgiving is, the atonement and forgiveness of Yom Kippur. The happiness and excitement of a birthday or a 4th of July fireworks show. All in one 2 day celebration (I count Christmas Eve). I love Christmas. It's the most wonderful time of the year.