I like most of these but my top three choices are egg nog, Christmas dinner and Christmas gifts. The two I absolutely wouldn't want are fireplaces (fills the room with too much smoke) and that icky elf on the shelf.
I'd go with dinner, tree and gifts. I typically hate Christmas, it's just so much stress and it effects me in the worst ways. My mental health is basically at its lowest between end of Nov until mid Jan.
But the dinner is usually tasty, I love how fancy it is. The tree is whatever, but real ones smell super nice. And free stuff is always welcome