Haha I have a sis at the age of 16 too. I keep on offering her headphones to listen to and she occasionally does, enjoying them. Then I tried getting her good headphones and she refused, telling me how she wouldn't use them.
Then I found some ath-ck400i and they looked nice, so I tried on her and it worked! Only after she tried them she gave them back to me and said how 'they sounded like plastic' haha. I guess she's either a never-headphone person or a audiophile-grade headfi-er now.
She makes funny comments about my cans too...
MS-1
They are so warm! (Me: eh?!)
Turned out she was saying how the earpads are so warm after I've worn them for like the whole day...
MS-1000
Ohh I can hear the guitar is there *points, then the vocal is here *points and and... the drums must be out of this room 
DJ1 - (Played her Page Avenue by Story of the Year) OMG BASSSS!!!!
And once I plugged the HD580 and the MS1k both in my E9 playing My heart will Go On and we sung it to Mum lol...