When I first started playing out, I picked up a little book called ART OF THE SOLO PERFORMER from this site. I have mentioned it several times before. The main point of the book is that performance is all about the audience, not the performer. If you think back to performances you have seen, you can usually tell when the performer really and truly cares about the audience having a good time. Regardless of the level of musicianship, if the audience has a wonderful time, you can rest assured that it was a great performance. Sure, critics can pick it apart, but I say critic schmitic.