Success isn't the same as talent. The world is full of talented people who never succeed at anything. If you want to be truly successful, you can't be content with "pretty good." You ned to find that extra gear.
Great leaders rally people to a better future. You're a leader if, and only if, you are restless for change, impatient for progress, and deeply dissatisfied with the status quo. As a leader, you are never satisfied with the present, because in your head you can see a better a future, and the friction between "what is" and "what could be" burns inside you, stirs you up, and propels you forward. This is true leadership.