I got my license at the "normal" age of 16. I was teased from time to time through college about driving too slow or waiting too long to pull out in traffic.
I am still quite a cautious driver. I have never been pulled over for speeding or anything reckless (only things like the brake lights being out and so forth.)
However, I have done some pretty dumb things driving from time to time, especially if I have been driving a long time or have had a very tiring or stressful day or have been in a lot of traffic. If I get stressed, it does affect my driving decisions. Thankfully, nothing really bad has happened!
I am not a good long-distance driver. I have had to learn how to become a more aggressive driver now that I drive in the city a lot. But, I've been driving for a long time now, so I was ready to learn.
I have been in three accidents, all in college. In the first one, it was the other person's fault. (He pulled into my car while I was stopped, thinking I had pulled out into traffic.) In the other two, I backed into parked cars. In none of these situations were any of the cars going fast, so no one was hurt and minimal damage was done to the cars.
The worst thing about accidents was not knowing what to do. I "knew" what to do because of driver's ed, but I wasn't so good on knowing how to handle myself. I was a nervous wreck and crying so much out of nerves/fear/embarrassment that the cop repeatedly asked me if I wanted him to call my parents who were about an hour away. I was 20 at the time, I think. I was more afraid of my parent's reaction than what happened with the accident, so I said no and finally pulled myself together. I had a friend with me, so that helped.