I don't know about good and evil, but I think that some kinds of music can make people more aggressive. That's why Nazis choose punk. Also, some kinds of music can make a person sad. That's why emo kids like emo. And some kinds of music can make people uplifted. That's why gay people like disco. ETC. As for that person who said that it's all about memories and it's all relative-- I don't even consider those people as even liking music, because they don't care about the music at all they just care about whatever memory it takes them back to.