I really don't care what other families do as long as they're happy but seeing as you asked:
Wrapping stocking presents is wasteful and absurd. It's fair enough if you're a family who puts larger gifts in a stocking but why wrap bubbles/chocolate coins etc? They're hidden in a stocking, there's plenty of suspense as you dig them out.
Turkey is just dull no matter how it's cooked. I'd far rather have any other type of roast and so we do.
The world (and I include myself in this one) has fallen hook, line and sinker into the expensive advent calendar marketing black hole. It's a genius plan whereby we spend a fortune to end up with lots of little bits of crap in our house that is often wasted. I think it's unusual that all 24 doors provide something we would actually use. After a few years of buying into the hype, we've gone back to basics and have enjoyed it just as much.
Christmas Eve and Boxing Day are much more fun than Christmas Day itself.
Sprouts are evil.
There's such a thing as too many fluffy socks.
Hot chocolate bombs/spoons and the like are usually disappointing.