[zopper]

I have found that self-taught programmers are better at debugging as they frequently had no one to turn to when learning as compared to someone who started studying in university. They are frequently also more passionate about programming than someone who just studied at school to get good grades or to secure a job.

But agree with other comments that if you are completely self-taught you will likely miss some fundamental knowledge which is crucial when you go from working on small side-projects to building large systems.