Our family has never had turkey for Christmas dinner! When I was a child at home, we always has a capon and for a fair few years, I continued the tradition once I married.
Then we started to have pheasant, instead, and continued with that for a few years. One year, we had a sirloin of beef, we have had duck, and last year we tried Guinea Fowl (delicious - and just right when there are only two of you!)
When we go to my daughter's for Christmas, (as we did this year), she usually serves goose. That also is delicious, if cooked and served properly.