Nothing, to change anything about me would negate all the experiences I've had over my years, and I've learned from each of them both bad and good.
If I could change one thing about my situation, I'd love to win the lottery so that I could travel to all the places in the world that I often think about, and to have the financial security to pursue any dream or option that I or any of my future children wished to.
But as for personality, I'm happy with who I am and what I have become.