For me, probably the defining moment of Christmas-in-church (as opposed to Christmas at home) is singing in our school choir at the carol service, at the start of the third verse of "Hark, the Herald Angels Sing," coming out of the trumpet-like tenor line of vv.1&2, surrounded variously as I am by the organ, the sops and trebles launching into a descant, and half a dozen brass players going crazy. Never fails to move me.

This year we're joint-premiering a new Rutter carol, which is a great honour and all that, but it just doesn't get me emotionally at all. Maybe in 30 years if it catches on in our repertoire...