I have been double tagged (at least.)
And since posting is currently easier than commenting, ;-), here we go.
Probably, my favorite Christmas song of all time is the Little Drummer boy.
I know, it's part of a kids play. It's about a child who doesn't have any frankinscense or myrrh. And let's face it, when he beats out his little tune for the newborn king, it probably sounded something like a little drummer boy beating out a tune. But that song. Doggone, it makes me cloud over almost every time I'm alone and really get to sing along. When that Baby looks at the little boy and smiles....
Behind that comes Oh Night Divine. I love to hold a dramatic note, and OND is just full of those, and at all the right places, praising the right One.
Then, just start listing songs about Jesus and ignoring songs about Christmas, and you pretty much have my list. Joy to the World, God Rest Ye Merry Gentlemen, etc.
I celebrate Christmas, with all its gaudy money flying around like skeeters in the Georgia dusk, but it makes me ill to sing about products. If I happened to feel like being a good enough sport to sing Frosty the Snowman, I still won't be a good enough sport to do it with a smile on my face. Sorry.