After trying so many headphones, I still think it is all preference. The more balanced a headphone is, the easier it is to hear everything, but that only matters if you prefer to just hear it. Being impactful and energetic, requires something to be emphasized... I don't just like to hear my music, I want to feel it. Whether it's from the warmth and breath of the vocals or the hit of the drums.
Live music can be a measure of how accurate a headphone is but only in comparison to live recordings... Most recordings are recorded in a way that is nowhere near what live music sounds like. Such as a guitar completely upfront in your face and a solo on your right side, singer singing to you as if your head was the microphone... The real life instrument for trance electronic noises doesn't even exist.
For me, I break down headphones into genres. Not from least accurate to most accurate, though I do realize what headphones are more balanced than others.
It isn't personal taste, you know. Your personal taste may determine what you buy, and that's fine, but personal taste doesn't determine which are the best headphones; their accuracy, neutrality and closeness to the original sound does that. People here sometimes seem to forget that there is an absolute standard, and that's the sound of live music, and it's not good enough to say that we don't quite know what the music sounded like in the studio when it was recorded because we have a pretty good idea, and we have a pretty good idea which phones attempt to reproduce it accurately and which are just boom or screech boxes. Of course, if you listen to electronic music I can't help you, and you're free to choose whatever phones it sounds good on, but you're not free to claim that it all comes down to personal taste. If that were the case, Bose and Dr. Dre would be as good as Sennheiser and Audeze as long as you or others considered them so, but clearly no matter how many people consider them so, they aren't.
As for bass, in live music it has much less importance than is commonly imagined. It gains an exaggerated importance in certain genres like reggae and rap, and then it's all important, but serious phones should never be designed to sound good only in certain genres. A good phone is a balanced phone.