I think music genres are terrible, because it doesn't accurately tell what I like to listen to.
There are so many genres/bands I never heard of because I will almost always be recommended things that sound similar to the genre of the song I'm listening to.
I could say I like rock but I like to listen to Dance Gavin Dance, Nightwish, Neck Deep, Demon Hunter, Coheed & Cambria and others but I also like Muse, Five Iron Frenzy, Anberlin, Sara Bareilles and Carly Rae Jepsen. Then there are bands listed as JPOP that sound nothing alike like ClariS, Myth & Roid, and Silent Siren, not to mention I have some Rap & Hip Hop like Royce da 5' 9", Aesop Rock, Danny Brown and Run the Jewels.
I can't forget I sometimes enjoy things like The Fray, Rascal Flatts and Garth Brooks.
Same goes for comic genres and other forms of entertainment.
My music also has 0 bearing of what I'm drawing I usually just put it on shuffle or browse YouTube.