It is absolutely correct that we are created in God's image. I don't think any personality test can do that justice or completely encompass our character and personality as God has made us all entirely unique. However, such personality tests can be useful. As mentioned previously, employers often use them to determine what kinds of jobs certain people are mentally equipped to handle. Personally these tests have been helpful for me understanding myself better. While naturally they will be incomplete and can't completely define who I am as a person, it can help me determine where some of my strengths and weaknesses lie. For example, I'm fairly introverted and enjoy the company of friends and getting to know new people, but because I understand that I'm more introverted, I know my boundaries and when I need time alone. It also helps me understand others around me, and how they perceive situations and react to them, extending grace when they don't react as I expect. Of course, idols can be made of anything, and I wouldn't want to put personality tests on a pedestal and rely on them for insight to every situation. It's easy to feel as though such things are the missing puzzle piece that will make you see your life in a new light and make everything click into place. Personality assessments, while fascinating, can't do this, but they are useful when used in the correct context.