I have posted my impressions about all of the above across different threads along with what genre I(subjective) think would go well.
I can't categorize even a single headphone / earphone for any particular genre. It wouldn't be right. Its not right to say that a bass heavy headphone would be preferred for Trance. People like Faheem like Re0's which are known for the treble and guys like Metalspree like mids and loves the Re1. And i'm talking about the same Music they both listen to.
I could still say, and this is my taste :
Grados : Movies, Dire straits, Alanis morissette, Eric clapton, Bob Dylan Doors (you get the drift

) basically anything with vocals and Guitaring.
M50 : Electronic, Trance, Dance. basically anything that makes you dance. I think these are the most under-rated Headphones. Arguably the best Hps < 200$.
Beyer : Cheap hps, throw it in your bag and play anything and everything.
Triplefi 10 : Anything you can throw at these babies. Although i would recommend Um3x / Ck10 since i loved these two for their detailing and instrument separation. But for bass, TF10 Rulez!!
Hippo 10 : Nice long cables. Can be used to dry clothes