That’s like one of the super grindy JRPG titles I have (100 hours or so to get through the story). To get all the achievements, you’d have to play through an absolute minimum of 9 times, because you need to kill the end boss without taking damage on each difficulty level, and they unlock as you go. But you’d actually be grinding bosses for ages trying to get them without taking damage…
The game was ok, but I honestly can’t see wanting to play it twice let alone 9 times… there’s definitely a reason almost nobody has those achievements…
Food related patterns would be pretty strong indicators for me as well, I think.
I only eat after 4pm (sometimes only from 6-10 or so) and people comment when I actually eat earlier than that, especially breakfast. I almost never use condiments or salt (I’m on a very low sodium diet and have been most of my life; I don’t use salt outside of baking, and that’s half salt). Give my dopple unsalted fries and you’ll know right away.
Drinks would work well for me as well - coffee made a very specific way, or room temp water, mostly (I actively dislike cold and hot water).