If you ever feel useless, just remember that Kirk Hammett has been doing back vocals for the past 36 years. Do you know what his singing voice sounds like? Neither do I. No one does.
Hmmmm I still think Percy is a Gryffindor though? (not to compare him to Harry Potter) but Voldemort and Dumbledore both say that Harrys fatal flaw is his loyalty to his friends and family as well and that he would do anything to save them and protect them, but that doesn't make him a Hufflepuff??