I'll kick my list off with
Christmas Crackers- yes when the DC were little they were fun, but , IRL they are full of tat, they don't make a good 'bang', I always end up with bits of paper everywhere.
Christmas Pudding/Cake- I make these if I have a housefull, if not then they don't get eaten
Big Tins of Sweets- you just know the manky ones will sit there fossilising till they get thrown out
Cheese- the ones you think are special for Christmas (usually in fancy packaging) they sit in the fridge judgily
Big tins of biscuits - only the nice ones get eaten, the tin hangs about forever with two custard creams in the bottom.
Gift sets- the ones they sneak out for Christmas , lots of style of substance . Would I buy them individually? Probably not .
Christmas cards- I see nice ones , some for the DC to send to friends. I post out to family but the rest sit there , unwritten till they get pushed into the loft (where I forget them next year)