Hello sir..  Doshas is samatva i.e, equilibrium of tri doshas are not found in any person that easily. Any of the dosha will be predominant. Even having 3doshas in balance state in a person(prakruthi-body constitution)  is rare & very rare. Instead when particular dosha is more you have to do shamana (pacify that particular dosha) by changing the diet , activities, etc. Example: as you asked PITTA prakrithi. (Here agni mahabhutha is pre dominant) Pitta prakruthi (pitta dosha dominant person)  will have more anger , take tensions,  like spicy foods, etc  when compared to Vata or Kapha prakriti person.