To me, being successful means...
accepting myself as an imperfect being, feeling strong and energized in my body, and cultivating healthy, mutually respectful relationships.
My definition of success has changed over time.
It used to be more about quantity, like number of friends, amount paid, amount of influence, how well known I am. Now it's become more about the quality of my work and relationships -- noticing what nourishes me and what drains me, and making decisions about my life accordingly.