Take some singers- Bob Dylan, Andy Irvine, Geddy Lee (Rush- Canadian Rock band). Their voices can irritate. The whole point has to do with the mood the listeners in.If I want to be lifted, i'll listen to Queen signing 'The Seven Seas of Rhye.' If I want contemplation, i'll listen to Rush's Xanadu (noy Olivia Newton john's crap), if I want revolution, Dylan is the man.