I am of the belief that there is something good to be found in every genre of music. I used to be close minded and refused to listen to genres such as hip hop, electronic music, indie, etc., and then I stopped being stupid, changed my point of view and dug past the shit pile at the top towards the gold buried below and I've discovered countless new innovative and creative artists because of my expanded taste in music.
That being said, two genres I generally don't bother with are teeny-pop and prog metal that doesn't make an attempt to actually be progressive.