I learnt that lesson with Sennheiser, and I'm not the only one, just look at all those HD800 modding videos, MODDING a TOTL headphone, wtf! I now focus primarily on sound signature as companies seem to present more commonality in signature than models; when people say warm, dark I think candidate, when they say reference or balanced I think bright or boring, and when they say bright I know it's brain piercing. I also factor in the reviewers perceived age as older folk start losing higher frequencies. I'm in my 40's and I tested my hearing with a tone generator which demonstrated I'm good from 4hz to 21khz, 21khz sounds more like faint static or wind not sure if it's my hearing or reproduction, but 18khz is a very audible whine. And 4hz is more like pressure than sound. Shure's sound signature is about as bright as I can stand. Denon's about as warm as I like. Bluetooth headphones just seem like they're missing a whole bunch of frequencies... not noticeable unless A<>B with something decent and connected, or the fatigue the bring after >1hr. Bose has a most boring sound... just bland. Frequency response charts I find quite effective in portraying objectively the charter of a headphone... but then I start wondering what EQ is for. The charts seem to show the Z1R's go very deep... consistent output from 10-100hz, then an unusual peak 9-10Khz; this suggest tuning to a younger ear... who here has increased base and treble before... well they do it natively. All the above said I have to confess I'm not really a music lover, I'm foremost a gadget lover, and personal audio gear is a lot cheaper than camera gear... I love experiencing humanity's technical endeavors to understand the technology behind it.