To a degree.
For instance, anyone who listens to rap/hip hop is, at least, without taste.
Agree with John! To an certain degree yes it does! Because you can't listen to love and romantic music and then say you aren't a sucker for love! Ha!
Seriously though, music can't define who you are because we are so much more complicated than that, but I believe that with age the music you listen too can greatly describe your personality. For example, I listen to mostly Pop and Rock songs, and some of the ballads of Westlife I listen too, reflect certain situations in my life and therefore I relate to that type of music.
Although just because one person may listen too heavy metal and rock doesn't mean they're depressed and think they're some sort of 'rebel'. But listening to music for me is mostly down to the meaning the song conveys to me, through this you may get to know more about personality because the happier the music, the more depressed a person can be (the person listens to happy music because they feel sad and therefore up-tempo music best suits their circumstance) .
Honestly, there's so much I can write but I'll leave you at this!
I listen to heavy metal and hard rock, but I also like pop music, and I'm not emo. I like wearing black and stuff, but I still act like a girly girl sometimes