I also really enjoy the idea of using persona's in music, as well. As a novelist does not always write books that directly express their principles, thoughts or emotions, I think music should be the same way. In Morrissey's case, just because he's never been interested in relationships does not mean that he shouldn't write a love song, and so on. Of course, a lot of that suffers from fans attempting to look way too deeply into lyrics, in an attempt to glean some deep insight into the performers life. Because it always works like that.