Music.

Everyone has their own melody, their own music...
It's not something chosen, really. It's something you're born with, and it's always evolving.
I don't mean like... When you're angry all your music is played in a minor key or something like that.
That would be silly.

I mean like... Every person has a melody. A music that is part oft heir core.
If you get to know them well enough, you can hear it sometimes.
Sometimes even play it.
The people that get along best; their music resonates.
The people that love you listen to you, and appreciate you...

The problem is, most people aren't looking for your melody.
They're looking to see if your melody compliments theirs.