1. Loud chewing
  2. Loud chewing on public transit
  3. Senses of entitlement
  4. Not saying "thank you" to the person holding the door
  5. Huffiness
  6. Finishing the last cookie / biscuit / cupcake without checking in first (group gatherings only)
  7. General impatience
  8. Rudeness directed toward the waitstaff
  9. Rudeness in general
  10. Olives (yuck)