Well done to everyone working Christmas Day (or night). I have only done so pre-children.
However, I just wanted to share my experience as a child growing up with a father who worked EVERY Christmas Day bar one until his retirement 8 years ago.
When we were younger, he was too junior to get a choice so always ended up with a shift covering all or part of Christmas Day. When he was working locally he would get home at some stage and we would open presents and eat at whatever time fitted in.
As we got older and he became more senior at work, he volunteered to work so that men (and then women when the system changed!) with young children would not have to work the day itself.
When he became even more senior, and we had left home, he would volunteer to work back-to-back shifts to give younger parents time with their families. This time also coincided with him working away from home and he would not have been able to get home on Christmas Day as there are no ferries!
Now he is retired he generally is around to fall asleep in an armchair on the day itself - although some years he and my mum go away over Christmas and he is actually working it this year (couldn't stay retired on a full-time basis for his own sanity!)
All said, we NEVER felt that we were missing out on anything by him not being around all day or even at all sometimes on Christmas Day. My parents both feel that they would have liked him to be around more and that is why he worked when we were older so others didn't have to go through it. Our family does have some annual traditions but maybe not as many as other families due to the day itself being different each year depending on when he was home. (It may also have something to do with my parents' own upbringing and whether they had traditions anyway!)
So, whilst all of you people who are working and worrying that your children miss out - I seriously think that you miss out a lot more than they do IYSWIM.