Worst Roommate Habit

Every habit on this list has ended a lease somewhere. That is the standard for inclusion, rather than mere day-to-day irritation. The entries divide between the material and the social, and the social side is consistently worse. Dishes in the sink and hair in the shower drain are unpleasant and fundamentally solvable. Passive aggressive notes are not solvable, because the note exists precisely to avoid the conversation that would fix the thing it is complaining about. Thermostat wars are the same problem wearing a different jumper. Eating clearly labelled food is the only entry that is unambiguously a small theft, and it reliably outperforms much larger inconveniences for exactly that reason.

The full field is thirty-two habits, described rather than pictured, on the assumption that everyone will supply their own former roommate.

Never paying rent on time sits oddly in this field. It is by a wide margin the most serious item here and it competes against grievances that are mostly about being annoyed, which is a decent illustration of how living with other people actually goes wrong.