Let's see,
Jingle Bells
Santa Claus is Coming to Town
White Christmas
Blue Christmas
Christmas in Dixie
I'll Be Home for Christmas
Have Yourself a Merry Little Christmas
Silver Bells
Pretty Paper
Rockin' Around The Christmas Tree
Jingle Bell Rock
All I Want For Christmas is You
Let it Snow
Winter Wonderland
Feliz Navidad
Please Come Home For Christmas
Christmas Song (Chestnuts)
Frosty The Snowman
Rudolph the Red-nosed Reindeer
We Wish You a Merry Christmas
Deck The Halls
If We Make It Through December (that's a stretch!)
Grandma Got Run Over By A Reindeer
I Saw Mommy Kissing Santa Claus
Christmas Time Reminds Me of You (original)
On certain occasion, I do more traditional or religious, Christmas songs such as Oh Holy Night, Away In a Manger, Silent Night, etc.
I'm sure I'm leaving many out.
Also, I often start a style, say a 2/4 Country, and start playing a verse or so of every Christmas song that pops into my head, no vocals.
My all time favorite Christmas MELODY is Oh Holy Night. I think it goes back to days when I used to play in on trumpet, shortly after the birth of Christ!
Merry Christmas!
DonM