I am sure there are a lot of us that feel we never hit our potential.
What are some of your PB's and what do you think they could have been (i.e. what do you think your talent level would have allowed, taking into account how you would actually have trained under different circumstances. That doesn't mean if you suddenly quit school and ran 150 miles a week, but rather, if you hadn't been injured, or just added a few extra runs a week, or just put one season together properly. That kind of thing. But be realistic.). I will start.
800 - 1:58.1. Think it could have been 1:55
1500 - 4:01. "..." 3:54
3000 - 8:55 "..." 8:25