What types of people did Hippocrates distinguish?

Answer Hippocrates distinguished 4 types of human temperament.
Sanguine – balanced, optimistic, cheerful. A sanguine temperament characterizes a person who is cheerful, emotional, sociable, living in a mood. He easily survives failures, creates a pleasant microclimate in any team, but does not always fulfill his promises, is sometimes too hasty in business and judgment and overly self-confident.
Choleric – hot, unrestrained, bold, perky. Such people are proactive, enthusiastically take on any work (except routine) and easily overcome difficulties. They are able to capture information on the fly, have leadership qualities, but are impatient, quick-tempered and prone to emotional breakdowns.
Phlegmatic – calm, restrained. He does not adapt well to the new situation and in adverse conditions can become passive and lethargic, while at the same time he is distinguished by self-control, patience, and enterprise. In society, the phlegmatic is moderately sociable, does not like idle talk and is not prone to panic in stressful situations.
Melancholic – sensitive, non-energetic, painfully responsive to trouble, prone to despondency. People with a melancholy temperament are subject to pessimism, are excessively suspicious and jealous, but have analytical thinking, are creative in their work, have a delicate feel and bring the matter to completion.
It is almost impossible to meet a person with a “pure” type of temperament according to Hippocrates – each of us represents a certain mixture. As a rule, one of the types predominates, while the others, respectively, are less pronounced. If a person took about 25% of each of the four types of temperament, then such a person is called a tetravert (four from Greek. Tetra).

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.