I post about 25 Christmas cards each year to overseas friends and family, and Uk based friend and family who I won’t see during December.
It’s expensive (£50 all in?) but I really value doing it, it gives me huge pleasure and I’d rather forgoe something else and spend this money. I tend to get around 15-20 cards back through the post and another 10-20 hand delivered. These are a central part of my Christmas decorations.
I always write a few personal words in the cards - as much as I can, so it’s not just a signature. It takes me 2 evenings on the sofa to do it, and 5 minutes to post them.
I keep all the cards every year, and store them away with the decs in January, then early December when the decs come down from the loft, I get them out and re-read them. Any card from a loved one which is especially sentimental (eg they passed away) I might keep in my collection of sentimental correspondence. All the others, the kids cut up to be used as name labels for this years’ presents.
I’m in my early forties, very busy with a demanding full time job and kids, but this effort and relatively small expense gives me enormous pleasure, in many ways!