Temperaments.

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Across
  1. 2. Single indentity of mind and body
  2. 7. Love to be alone
  3. 8. Homour for Sanguine
  4. 9. Symmetry of opposites
Down
  1. 1. These people are good leaders
  2. 3. Can be found in a crowd and are good negotiators.
  3. 4. humour of Melancholic
  4. 5. Humour of Choleric
  5. 6. Socialable and likeable.