Who Exactly is My Character?

We all go through the time when we don't know who exactly our characters are. Are they quiet? Funny? Considerate? Reserved? Loud? It's important to know as much as you can about your character. 
Lately, I have been taking personality tests for most of my characters. I use the Human Metrics Jung Typology test. The questions make you really think about who exactly your character is. Sometimes the result I got for my character doesn't seem quite right. And other times it fits them perfectly. ...