IME there are nearly always tensions between the perceptions of the person/people who wrote the music and those who didn't as to audience reaction. I've just started playing with an old band. There are four originals in the set. Even when rehearsing them I can quite literally feel the drop-off in energy we used to experience at gigs when we played them, people who'd been really engaged started talking, people who'd been on their feet sat down, people went to the bar, people walked outside for a cig etc, and we lost the room. But the songwriter/singer can't see any of it