Spent the week travelling with a coworker, he noticed I was carrying two (!) headsets and a weird-looking black box (PA2V2) with me. I explained that the MDR-V6 was for noisy places like the airport, and the vintage, open ATH-L2 was for the peace and quiet of my hotel room (with the portable CD/DVD player in my suitcase).
I let him try on some Pink Floyd with the Sonys and there was immediately a big smile on his face. Then he tried the Audio-Technicas and saw right then and there why I needed more than one.
After that I was able to explain to him that I had three more headphones waiting at home and he understood. He wants to shop for decent cans now - even told me he might spend as much as $150 on something good.
I told him to listen before he bought, and to stay away from Bose, Beats and anything that looks like a teenager might find fashionable (or a Bob Marley fan, for that matter).
We got a new one, I think!