What makes a person a good driver?
Situational awareness. Knowing when to be aggressive, knowing when to be passive. Too slow is as inappropriate as too fast. Doing one's part to keep traffic affected by you flowing at a safe, appropriate speed. Don't hit other cars, don't cause other cars to hit you. There is a Zen to driving in traffic. Except in New York City, where Automotive Anarchy reigns and its every man, woman and child for themself!!!