The thing you keep noticing in other people is often the thing you’re working on yourself.

Your attention is tuned by whatever is unresolved in you, so the trait you keep spotting everywhere is usually one you are in some kind of negotiation with. People who are relaxed about lateness do not notice who is late. The constant noticing is the clue, and it points inward more often than outward. That is not an accusation, it is a map.

Name the thing you have caught yourself commenting on three times this week. Then ask honestly what your own version of it is. You may find you are strict about it in yourself, or quietly sliding, and either way that beats another observation about somebody else.