In the Hippocratic world, we have now come to the sanguine person. What other words can be used to describe him? Optimistic and cheerful, a person with a bright outlook on life. The thesaurus even suggests the epithet a man of possibilities … how about that? It is, in fact, an excellent description of Yellow behavior. These are people who live to live, always finding opportunities for enjoyment. Life is a banquet, and Yellows will see to it that they savor every bite. They are driven by merriment and laughter.