@thewirelessblade Look at the people around you. What makes them different? What makes them unique? How do they respond to certain situations compared to others? I believe that watching and understanding a wide variety of people is a crucial building block in creating a wide variety of characters.
Also, reading about different personality types is always useful. How much do you know about MBTI?
INTJ ➸ https://thesarcasticelf.wordpress.com/