Although I find integrity, communication, compassion, and excellence to be very important quality traits to have, what has served me the most is independent thinking(the ability to think on my own).
Thinking is the foundation for everything else, it's the first thing you have to get right or else everything will crumble to the ground.
Life is a beautiful but deep ocean that we need to learn to navigate successfully, and all we have at our disposal is a raft at the mercy of the elements.
Independent thinking is the only correct working compass in life because your problems are unique and so they require unique solutions.
Stop worrying about your purpose! God doesn't care, you do! God loves you no matter what, so just do something beautiful, and you will feel worthy of his love. :)