This actually is pretty debate, so I'll introduce.....

The Jahari Window. A model to map personality awareness. How you perceive yourself and how others perceive you are totally different!

There are four squares,

Arena -what you know what yourself and what others know about you.

Facade - What is known to you, and not to others

Blind Spot - what is not known to you, but known to others

Unknown - Characteristics you don't know about and others that don't know.

You can see from my window: Interactive Johari Window - yo I am guy's Window

I had my best friend, and girlfriend do my window, and as you can, how I perceive myself, and how others perceive me are totally different!!

Heck we can judge each other lol:

Interactive Johari Window - Mapping Personality Visibility