Unfortunately I won't be attending mass because I volunteer on Christmas Day to provide lunch to around 100 people who would otherwise spend Christmas alone. I get as much joy out of it as they do. It's such a busy time that I think I'll be forgiven.
I did go once with a friend...as she was Catholic, and it was LOVELY :)
Normally at my Church we have a one hour service for Christmas Day....from the nearly 2 hrs on Sunday's......It's great to give a few gifts and wish Church family 'Merry Christmas'....I really love it! :)
I play the music for my church (on my violin though, not the organ/piano) and my parish has two churches which alternate the midnight/Christmas day services each year, so this year it's my turn again for midnight, and I get the next day off !