you're definitely wrong, but that's okay.. bc you are right on one point:
all that matters is that YOU like it!
if your subconscious, placebo, expectation bias, whatever causes you to prefer one thing over another, that's fine.
Just don't go around claiming that the difference is actually real.
in a sighted test, all rationale gets thrown out the window..
maybe you like the design better, maybe the brand speaks to you more through marketing, maybe the price "must" mean something, bigger knobs are awesome, etc..
also, in a blind test, often times people fail at the most crucial part: volume matching..
go to
www.audiocheck.com and make the tests to see how your hearing holds up.
Many people can hear as little as 0.1dB in volume differences. (I suck, I can only easily hear 0.5dB)
to match the volume to this degree, you'll have to match the output voltage to fractions of milli volts for many headphones! If you don't, the louder one will always win.
Now, I do agree that we can just skip all the testing and simply use what we LIKE objectively.. in the end, it's all about loving music and enjoying it.
If a horrible tube amp gives me greater enjoyment bc of the glow and the distortion, fuck measurements