The fruit of the Spirit are the results of living a Spirit-filled life. If you wonder if you are walking in the Spirit, look at the fruit of the Spirit and see how they compare to your life. If God is controlling us by His Spirit, then they will be evident in our lives. "But the fruit of the Spirit is love, joy, peace, longsuffering, gentleness, goodness, faith, meekness, temperance: against such there is no law."
I wonder if someone were to say, "what are some characteristics of David Carrel," what the answer would be? If it would be the above couple of verses, I think that would make me pretty happy. But that is up to me and my life and how I allow Christ to live through me. And it is up to you for your life too.