To me no genre is 'better' than another since there is no real way of scaling music. If the argument is 'But no one likes that music' clearly someone does otherwise they'd stop making it and the music that majority of people like is mainstream, which is considered bad by the same people. To me, if one person likes it, then its good for them and not for me to judge.
I used to be into dance and rap, then I discovered Linkin Park and that led to a HUGE emo phase. Now, I listen to anything, but usually things with a happy feel, such as Angels and Airwaves or soundtracks.
Only thing I don't perticularly like is bands that are in it just to attract the opposite sex, like Cute is What we Aim for or All Time Low.