Funny thread so i thought Id share my expiriences:
First person was a co-worker. Her words on my HE-400 with Fiio E17 and cowon i9 with a FLAC file : This sounds so... clean. I cant hear anything but the music!
Second was another Co-worker, no words just a head movemenet approving the sound.
Third was my cousin listening to the HE-400 from the schiit asgard amp, no words, just a big smile for a long time and after the song, no words again just big eyes looking at the headphones with a smile.
fourth, another cousin, she drops by once a month to listen to music since then.
Fifth, an old friend from Madrid, again, great results.
Finally, my EX, "they are heavy"... Perhaps it was not such a bad thing that she dumped me :D.