Interesting thread - I agree I go for harmony most times for voice preservation and I think idleness in not learning the correct tune but finding something that fits. Like Pap, I can often sing along with the singer using a harmony - what is the correct folk etiquette for this?

I guess this is why I hate amplifed music so much. I love to sing next to others singing harmony and vary the harmony to chase the 'gaps' in the music, when you hit the right chord it stands the hair up on the back of your neck!