What are the really small things that tell a lot about a person's psychology and personality?

1. The speed of eating — fast eaters are ambitious, go-getters and impatient. Slow eaters are one for patience and savoring life’s pleasure.
2. Response to insults — people pleaser if they accept every insult, insecure if they get super-defensive, confident if they joke around it.
3. Ability to express emotions — people who can’t talk about their feelings have an unhealed traumatic history.
4. Showing anxiety physically — people who do repetitive behaviors like biting-nails, tapping foot tend to be perfectionists.
5. Behavior towards better people — if they talk with the contempt towards someone better than them, they feel threatened and jealous.
6. Who they talk about in a conversation — low self-worth if they deflect questions about themselves. Narcissistic if they can’t stop talking about themselves.
7. Ability to take a joke — the easier it is to offend them the bigger the ego and lower the self-esteem they have.
8. When pointing out their mistakes — big ego if they get offensive, victim mentality if they blame it on others, humble if they can accept.

Source : Rafael Eliassen