I’m generally listening for the bass. Most headphones do the mids and treble well enough, it’s the bass that makes the difference.

I’m using two sets of ear buds now. One pair is pretty good for sound, but are excellent for phone calls. The other is mediocre for phone calls, but is great for music, with excellent low end response. They’re some of the best earbuds I’ve ever owned, at any price.

I wish I could find a single pair that does both in my price range, but I haven’t been able to.