We started, quite a few years ago now, doing "Platter" for Christmas Eve. It is adaptable, allows various favourites to come out, but can be changed according to changing tastes or availability of things. And it is also a very relaxed meal both for the chef and the diners.
My list below is generally what we have - but not everything every year. We put out enough of a choice and sufficient amounts of food that everyone is satisfied, but not so much that there's loads of work to tidy up the leftovers. And some of it we prep ourselves, but lots comes from M&S or local delis that we just need to plate up. And it is mostly cold, but sometimes there are a couple of hot elements.
There is always salad-y stuff:
carrot sticks
pepper sticks
olives (black and green)
cherry tomatoes
generally salad leaves as well
sometimes things like spring onions or radishes
sometimes sweetcorn (from a tin) for DD
If I get to the good deli locally, there will be "proper" coleslaw
Or I might make a salad - potato, pasta, etc
There is always a plate of meats - enough for at least 1 slice each of everything, and usually 2/3 different things:
Good cooked ham
Cured ham (parma or similar)
Spiced beef
"Proper" corned beef
Braseola
Salami (various types)
Lomo (a cured pork)
Cooked streaky rashers (M&S)
Also some fish on a separate plate - again a combination of some of:
Smoked salmon
Hot smoked salmon
Salmon pate
Crab claws
Prawns
Squid rings
Garlic mussels
Some years we have some paté, but not every year.
We always open the Christmas cheeses, and have nice crackers to go with them. So there will definitely be a blue, a hard and a soft cheese, likely a few more, things like:
Stilton/Shropshire blue/Cashel
Good cheddar/Compte/Mature Edam/local cheeses
Brie/Camembert/Caprice des Dieux/
Or things that our local cheesemonger recommends as being perfectly ready for eating
We have some good crackers for cheese, but also flatbreads/breadsticks to crunch on, and often a lovely crusty loaf if we've been able to get one.
Usually there are a couple of "dippy" things - HM salsa, guacamole (HM or M&S), hummus, sour cream and chive dip, tapenade ….
There might be a pack or 2 of M&S party food.
We will open a good bottle of wine and DD will get something which is a treat for her (J2O or maybe a can of something fizzy that's not coke).
I will often put the candles out and open the packet of Christmas napkins.
It's about sitting as a family and enjoying the food, rather than our normal mode of rushing it as we get in from school/work, face into homework/more work/housework etc, when food is more of a fuel. Everyone chooses what they would like from the middle of the table, their plates are empty when they sit down. As long as there are things on the table that you know your family WILL eat, it can be a good time to try things that you like but they generally don't - as when there is not pressure on, we've seen DD try all sorts and come to love lots of them this way.
We also have tea/coffee and some sweet nibbles available for afterwards, but generally don't really want them. We go light the Christmas candle and then open the Christmas Eve hamper after dinner, DD has her Lush bath bomb bath and gets into her new PJs, and we all have hot chocolate (or a Christmas beer) and a mince pie together before DD heads for bed.