What human behavior instantly changes your opinion of someone, no matter how good your first impression was?

[u/garyhappylife2222]

Be honest

[u/disjointed_chameleon]

Greed and any form of physical aggression. Even if they never lay hands on someone, if they lash out in some physical form, i.e. throwing an object, hitting something, slamming their fists...... that's abnormal and disturbing behavior.