I have heard good music from every genre and I've heard BAD music from every genre. Yes, I've even heard decent rap that was meaningful and wasn't garbage. I never thought I'd find something like that, but I did. I think of Font Minor - Right Now in particular when it comes to these very rare cases.

And I generally love techno/trance/electronic music, but oh man... I've heard BAD techno and I can't stomach it for more than fifteen seconds. XD