First of all Marion I think its great that you are thinking about what the audience wants and that you would like to be better for them. However there seems to be no need to agonize extensively after the fact if you didn't reach your standards. The audience liked it, that's wonderful! Now you can work on making yourself more comfortable about performing. Either by attempting to live up to your obviously high requirements for performance or by consciously relaxing them a little bit so that you can be happier. Whcichever way you go good luck and keep playing for people.