Every year at Christmastime, this song is immediately on repeat in my head. In my imagination, I'm walking down a street while this is playing in the background and it feels like Christmas. Ironic that a melancholy song is what helps me get the spirit.
I also just love A Charlie Brown Christmas. It's probably my favorite holiday special, including Rudolph the Red-Nosed Reindeer, because that was my favorite as a kid. I don't get super enthusiastic about things; that's just not how I express myself. So this is right up my alley.
It's also a classic, so if you don't know it, you should.