DT990 emphasizes the bass and treble too much that it makes the whole midrange (where most instruments, foley, voices, etc are) feel distant and hollow sounding. It's not a balanced sound. That was my experience with them.

The DT880 is more balanced but also has a similar flavour of sound since it uses the same driver. I still have mine but I've slightly dulled the treble with a disc of felt to bring out the high mids more, they're pretty great now.

If you want a balanced mid/treble I would maybe look into getting something like that, or the Sennheiser HD560S or AKG K612, but if you want a bit more bass like the DT990 then I recall the Shure SRH440A and AKG K245 having that.