My ex used to do that too! Both the drinking, eating, sleeping and avoiding cracks
Fully sitting down on the ground with legs stretched out in front of me to tie my shoes (if the ground is ok to sit on).
Jumping down the last couple of steps of the staircase.
Playing videogames.
I’ve been known to climb stairs on all fours on occasion. It’s still faster I swear!
Put a small rock in my mouth. It is very soothing
Playing donkey kong
I still don't like brassica (cabbage) cultivars. TBF, due to IBS-type digestive issues they're probably not that good for me anyway - eating food that makes you gassy is kind of a bad idea when you often have stomach cramps and diarrhea.
Not sure whether that's uncommon enough for this thread, though.
Strawberry-flavoured sandwich cookies shaped as funny faces. They're something children love, but apparently Millennials like me never stopped being children, so...
I used to buy them but I'm avoiding the associated brand, so nowadays I make them at home. (With artisanal funny faces! Okay they look ugly but the cookies are IMO even better than store-bought.)
Own cuddly toys. With pride!