I don't like judging a whole genre as "bad." Every genre has some good songs, and every genre has some bad songs. In terms of the "mainstream" songs of the genres, I would say pop and rap, since the majority of mainstream pop and rap is terrible to me. I'm not saying all rap is bad - I like some rap, I just do not enjoy the stuff on the radio like "watch me whip whip" or whatever the song is called.