Oh, you are serious.
I think my favorite one to perform is Christmas in Dixie. Just a pleasant, feel-good song.
https://app.box.com/s/9abefujwba7z65w9sd62prztabr3fen2

My favorite one really is one I wrote years ago. It reminds of a place in time that was bittersweet.
http://donmasonmusic.com/donchristmas.mp3


My other favorites are the "real" Oh Holy Night and Pretty Paper.