Thankfully, I've never had a really bad Christmas. Last year wasn't great because I had torn a muscle in my pelvis and could barely walk, couldn't sit, couldn't sleep, had no appetite and generally felt rank.
This year will be a lonely Christmas. I was going home to my parents, but some family members have the Noro virus and my dad has flu, so its just me, the cats and a fridge full of food and booze. Still at least I will not spend half of Christmas on the loo like some of my family.