Originally Posted by Neapolitan

I'm self taught, but I believe there are many advantages of having a teacher.
One thing about guitar is that you can never stop learning. Even if you feel confident that you're a pretty good guitar player, there is something out there to learn, a new riff, a new song, a new genre etc. Having teacher is more like having a mentor or guide. They can show you things that you are not aware of, but they can only pass on hints and tricks, and the right way of doing things, they can not pass on talent. In the end all musicians are self-taught by the fact it is up to them to practice, practice, practice.