Although I'm not so in to measurements myself, there are some who are for various reasons.
Some are in to them because they help them validate their purchases.
But as I've learned, some people know what measurements they like a headphone to produce, and it helps them make good decisions.
Fair enough, but I just get weary of people chiming in with the measurements, trying to prove the listener "wrong". Music is a physical and emotion reaction to itself within the soul. Who's to tell me or anyone else how I should feel that? Colorations can be horrible distortions or they can be gravy and cheese sauce. It's music, not a lab report.