How your temperament is constituted or cultivated does not indicate your general purpose. Even if you are designed with a particular personality and have enjoyed success in specific situations, you could easily be "purposeless" or "purposeful."
Fill in the valleys, and level the mountains and hills. Straighten the curves, and smooth out the rough places. Then the glory of the LORD will be revealed, and all people will see it together. The LORD has spoken! Isaiah 40:4-5