Who are my characters?

A few days ago, Sarah posted a great bit of character building advice over at TGNA ( http://www.thegreatnovelingadventure.com/2013/08/just-the-tip-of-the-iceberg-character-building/) and it really got me thinking about my main girls and boys of G4.
Sarah used an extremely relevant quote by J.K. Rowling that expresses an author's connection to their characters. I hadn't quite realized but each of my the main ladies has a bit of me in them. And the boys? I think I've crushed on all of them in my time.
Predictable? Maybe. But it means I know my characters. And I love them.
And when I say I know them, I mean it. S.E. Hinton, author of the Outsiders once did an interview talking about just how well she knew her characters but the internet has failed me so I can't share it with you. Her interview was the first thing I thought of when I read Sarah's post.
I'm happy to say that I know exactly what my characters eat for breakfast and which sock they put on first BUT I struggle to know which of those details are of interest to you. Sometimes I want to give you the whole back story because its totally interesting to me but I know I have to find my middle ground.