That being said, I do like measurement graphs because they can make things that audiophiles put in very vague terms more precise. "Bright" is a great example. You hear about Grados being bright. Some people call the HD600 "bright" but they have very different types of brightness. A cursory glance at a measurement reveals what's going on: HD600 has a 4kHz peak whereas Grados have a 10kHz peak. One is bright in a nasally way, the other in a splashy way. I'm sensitive to 4kHz more than 10 kHz, so the graphs clarify why I vastly prefer Grado brightness to HD600 brightness. Measurement graphs can also tell you if a headphone is "EQ-able" or if EQ will introduce distortion of extreme current drain on the amp. And any number of other useful things as well.
But if it sounds good it is good. I also think you should ALWAYS listen to a headphone before you look at measurements. Otherwise you will inevitably hear what you saw due to confirmation bias. I try to spend at least 8-10 hours with a headphone I am evaluating before I head over to innerfidelity. There's an occasional exception when I'm going to have buy before I can demo, in which case measurement based evaluation is simply a necessary evil.
Edited by fjrabon - 2/12/16 at 4:54am