Guess my age posts - it's always 15-18
Virtually every Letterboxd Top 4 "guess my age" post is someone who's 15-18.
For starters, people over 18 generally don't ask strangers to guess their age. The whole premise is inherently teenage: can you tell if my taste is sophisticated and mature?
Other giveaways include a pick that signals they take anime very seriously. Or a pick that has more recently become "canon" on best of lists, like La Haine.
Sometimes they overshoot and pick a Top 4 that looks like a teenager wearing a robe and smoking a pipe to look like a "serious film person". Other times they undershoot, like playing "guess my age" with chicken nuggets as their favorite food.
It's funny because they're trying to project an identity older than themselves, but wind up being the most teenage thing imaginable.