Just to make it clear once and for all, in case people in future ask. Beyerdynamic DT880 or DT990 are both suited for ANY, I repeat, ANY genres of music out there, as well as movies, games, or anything else that produces sound. They're both well within the margins of what can be considered Hi-Fi, or put simply, highly realistic sound. Despite people saying DT990 have more bass and treble, take that "more" with a grain of salt. The differences between them are MUCH MUCH MUCH smaller than you might think by just reading the comments or peoples reviews on them.
This is what you might think the differences while listening are:
But this graph is closer to what you actually hear, or the scale of the difference between them, we are talking about really small differences.
Human ear can't detect a difference of 3 db. This means if you were listening to some music with your eyes closed, and someone turned the volume up or down 3 db without you knowing, you wouldn't notice. Even if you do it yourself, its very hard to detect the difference in volume. And that's when increasing or reducing the volume of all the sounds. Now imagine reducing just a certain very narrow band of frequencies by 1 or 2 decibels...are you going to notice that? Yes, after 5 hours of A-B testing, and you still won't be absolutely sure its not placebo. I'm not saying that DT880 aren't different, it's just that their differences in sound signature mainly are over exaggerated. You'll hear people saying "DT880's are neutral, but DT990 have recessed mids" and similar nonsense. Ignore that. The most difference you'll hear between them is soundstage, which is bigger in the DT990, which makes the sound more spacious and more organic, or "bigger", "fuller", like you're listening to a larger space, while DT880's are more closed in. Again, small difference. As far as their sound signatures go, and therefore the genres their suited for, they're in the same bucket.
Same goes for AKG Q701, K701/2, HD600/650's, etc. All of these headphones will work any genre of music, especially for people who don't have experience with great headphones and are new to the hobby. If I gave my K701's to someone who's never heard good headphones, and put some hip hop or electronic music trough them, they'd be blown away by their performance, yet, you'll hear people say they're no good with those genres.