I buy Christmas presents for nephews/nieces based on how much it will annoy..
.. my sisters.
I challenge myself every year to find the perfect gift for my sister's kids that:
1) they will love
2) will drive my sister up the wall.
It started years ago when I bought them all Nerf Guns and Nurf Battle Axes/Swords when my sister had a 'No Weapon Toy' policy. I got THE LOOK when they opened their presents and started jumping up and down. Then I got yelled at for about 30 minutes while they ran around my house shooting and smacking everybody. It really hit the fan a few weeks later after they broke a TV in her house... That was a great Christmas.
After that she forbid me from buying any type of 'war' toy, so the next year I bought them all Melodicas, tambourines, and cowbells. If you have not heard the amazing sounds a cheap melodica can make during Christmas dinner then you haven't lived. I think my brother-in-law threw away the melodicas and cowbells a few weeks later after they accidentally broke.
The only gift I ever got a 'thank you' for was the year my nephews got an Xbox One for a birthday with the strict 'only to be used for Minecraft' rule attached. That year I bought them all extra controllers and every sports game available (Madden, NBA2K, NHL, Fifa.. w/Forza thrown in for good measure). My brother-in-law gave me a fist bump that year. (However, I still got nasty txt messages from my sister for a few weeks).
They are getting older now and it's getting harder to find that perfect gift. The days of buying 60lb's of Kinetic Sand are behind me 🙁