There's another side to performing, apart from the obvious one which is concerned with the technicalities: singing in tune, singing the right tune, playing the right chords, fingering without buzzing, halting, etc., etc.

Another aspect of it all is your own "artistic integrity", which is a high-falutin' way of saying doing your own thing in your own way and sticking to it - regardless of audience reaction. You may, for example, choose to perform a particular song that speaks to you, or perform something - a tune, a song - in a very personal way. And the audience(s) may not like it.

The question arises as to whether you bow to the audience reaction, or whether you say (in so many words) "Screw you - I'm playing this because this really is the way I want to play it". That's a decision that only you can make, of course, but it's an important one.

Which is a long-winded way of saying that feedback can be valuable - but don't try and be something you don't want to be.