Just me and DH here so no dc to consider.
We've done a few christmases away, all to relatively cold places - I resisted for years until one year when MIL, FIL and my parents were all pushing for us to spend time with them on Christmas Day and I was feeling stressed. DH said 'oh look, there's a flight to Iceland here on 23rd December, shall I book it?" And I said yes in a mood so he booked it before I could change my mind 😂
It was one of the best decisions we made.
The places we've been for Christmas are:
Prague - beautiful, you can do skiing trips if you'd like. Lots of bars, lovely to walk around (but I may be biased as it's one of my favourite cities anyway)
Reykjavik - this was very relaxing, we did a few trips (blue lagoon, chasing the northern lights) but mostly walked around enjoying the lights.
New York - amazing but so so busy, and beyond freezing (went down to -14° one night). We did all the touristy things but left the city on 26th and did a road trip (DC, Pennsylvania etc, back to the city via the Hamptons for NYE).
Scotland - spent Christmas on Mull, left 27th for a road trip around the very north coast (beautiful beaches) then did Edinburgh for Hogmanay.
All amazing - I'm quite sad we're not going anywhere this year.