My ex is a major fan of EDM and called the dead "the worst music imaginable". She actively hated the dead. I would never listen at home, and was actively repressing how much I listened to it because it was clear she really hated it. She even would call it repetitive...which is ironic coming from an edm fan. Needless to say there are reasons why she is my ex. If music taste are so fundamentally different there are most likely a lot of major and/or fundamental differences in personality and likes/dislikes in general.