[rukuu001]

It adds drama to a performance. When a performer is a little shaky the audience empathise with them more. With perfection, people just sit back and let it wash over them.

A performance I'll always remember was a community night, free entry, amateur performers. Some guy and his sister got up. The guy said 'Hey, this is my sister's first time singing in public, say Hi everyone.' And the sister looked like she was going to die. Then she sang like an angel, still looking like she was going to die all the way through. Audience went bananas.