My favorite Christmas CDs are the ones by Relient K and Third Day. These albums are a good mix of old favorites with a new twist and some fresh, new songs that will stick around for years.
One thing that disappoints me is Christmas albums with the same old songs, just sung by a particular artist. I like something fresh and new. The psalmist says to sing to the Lord a new song. Certainly that applies to songs of this season.
By the way, many of the old traditional songs are notoriously difficult to play on guitar, so it is great to have some new sounds. But just tonight I heard Trans-Siberian Orchestra's version of "God Rest Ye Merry Gentlemen," and they put some screaming guitar solos on the melody. Wish I could play like that!