How is it that I can go all day without drinking anything and not think twice about it? I don't even make a connection to dry skin, which in vanity mode, might make me a water drinker. But when I do pour myself a drink of anything except wine or coffee, both of which I can linger over, I have to chug the whole thing down? It's puzzling. And it's hard to not feel mortified when my grandchildren see me drain a glass of milk without stopping to breathe, then stand panting when I'm done. I'm going to count it as a foible.
As soon as I'd written that, I knew I would have to look up "foible". In spite of knowing I was using it correctly, I couldn't actually be sure of what it meant. So for your edification and mine:
Merriam-Webster says: foible... a minor flaw or shortcoming in character or behavior.
Just what I had in mind, and it perfectly describes what I've just exhibited by wasting your time writing about something so unfascinating.