That's a tough call. I know about someone who ran 52 for 400m and ran the steeplechase at the Olympics in 8:22. He never made the finals though even after running at the Olympics twice. I think it all depends on what you want to do. I've had various experiences and my opinions on running has gone all over the place over the years. In my case I believe even if someone could have told me my marathon time in the future would have been 2:14 I probably would have hung up my shoes. One is because I wouldn't have been top 10 which to me means being in "nowhere land" between hobby joggers and elites who can kick your butt. I also would have been worried all the time about getting injured (in a professional career). I had one experience years ago that made me convinced I was all wrong about stopping completely for 10 years thinking if I'm not going to be competitive, I'm not going to do it at all. I ran some 200's and felt like I had a high on the track. I really had fun doing it. Had it not been for the fact I mismanaged my training, nutrition and sleep, I would have kept running at that point just for the fun of it. In the end I realized if I had to do everything all over again (and manage my sleep, nutrition and training correctly) I would have done the following: do everything in a gradual manner from age 12 to 18, never go over 35 miles a week and never race anything over 5K, race only once every two weeks, run 2 or 3 years with a track club just to know how to train then run alone and train for the 800m even if I was better at the 3K, and keep my easy runs real easy. If I would have been a 2:01 eight hundred meter runner on 20 to 35 miles a week with no chance at the Olympics then at least I would have had the pleasure of training for fun and knowing it's all I want to do (no be obsessed about it by running twice a day but still being fit enough to easily beat casual Sunday joggers by a mile).
I congratulate the original poster who ran 14:44. Doing your best is the only thing you could do. I could run 400m in 60 seconds at the age of 14 and ended up quitting completely at age 16. Now I'm just experimenting to find out how to get fit again.