I just think they're mostly uninspired and uninteresting, if not downright annoying. "Jolly" is not a very compelling emotion for a song, IMO, and the religious ones aren't really for me. Most are just not good songs, and get played because they're part of the whole X-mas marketing racket.
There are Christmas songs that I like, but they are mostly darker, like Holly Golightly's "Christmas Solo," and Tom Waits' "Christmas Card from a Hooker in Minneapolis."
