Like they have always said.. "The song's the thing".. and like Boody says, "quality" is not the issue.. There are a whole load of other standards at work.. And they are in the minds of the listeners. The listeners minds vary greatly, so what makes me go, "YEAH!!!!" makes others go "Bleccchhh!!!"..
Whatever the genre, the song is king of it all. The marriage of song and production is absolutely key, but production with no song rarely yields a bona fide hit. Even if a hit song seems really stupid to you, maybe it really seems funny to someone else. And there's a big difference ....