When it comes to human nature, when looked at in detail, each individual appears unique and different from the other. Each individual has his own sets of likes, dislikes and traits. However, each of us appears to see a little bit of us in other people. This may be the motivation behind personality theory, which studies the variations of personality traits among individuals.

Though it is possible to group the traits seen among different individuals, it does not appear that an individual can only be of one personality type. The more likely scenario is that everyone is an amalgamation of different traits. Also, one needs to keep in mind the personalities of the people themselves coming up with lists of such traits. One needs to be aware of the theorists’s own biases and understand the limits of human knowledge and understanding. Nietzsche said:

“He who fights with monsters should be careful lest he thereby become a monster. And if thou gaze long into an abyss, the abyss will also gaze into thee.”

 – Nietzsche