The Little Imperfections
I was looking at my brother's Nexus 4 and saw that the capacitive sensors on the display were visible.

At first, I thought to myself that I would have sent in the phone to be replaced immediately after my purchase. Then, I saw the defect as an unique characteristic that didn't impede on the display when it was on; it was a pretty awesome "feature". This reminded me of an amazing scene from one of my all-time favorite movies, Good Will Hunting:
The line about his wife farting was entirely improvised; the cameraman laughed so hard that he shook the camera as you can see in the video.
"The little idiosyncrasies that only I know about: that's what made her my wife. Oh she had the goods on me too, she knew all my little peccadilloes. People call these things imperfections, but there not. Ah, that's the good stuff."