Lon Chaney's Phantom in the 1925 silent had a hideously damaged face, his mouth a lipless rictus, his eyes off-center in gouged-out sockets. When Christine tore off his mask, she was horrified, and so was the audience. In the Lloyd Webber version, now filmed by Joel Schumacher, the mask is more like a fashion accessory, and the Phantom's "good" profile is so chiseled and handsome that the effect is not an object of horror but a kinky babe magnet.
In the book, of course, she's described as very ugly and toad-like. And people say, "You'd be great for that part!" Thanks very much.