Lowden, I agree with you entirely.

"No matter how much you loved an artist, how bad would the performance have to be before you felt you had been let down?"

This state of balance you refer to is intensely personal and individual. Each of us draws the line in a slightly different place, hence the wide divergence of views axpressed here.

This thread will peter out all on its own. They usually stop dead right after I've made what I thought was a particularly dazzling and thought-provoking contribution. But seriously, I do think if the debate is to continue, it should have a different name.