I am surprised not to see more examples of those that have got the balance wrong.

Am I the only one to experience the player who does not add to any of the earlier proceedings but waits to the end and hogs the stage? This one usually hasn't bothered to bring their own instrument but will expect someone who has to give up the time that they could be playing their instrument, so that the star can shine.

Or the one who insists on playing the same fast riff, loudly to any and every song being played?