Well, one of them is a way better athlete, smarter, better-looking, and generally more gifted than the others, so naturally we prefer him. But the others are fair back-up.
I jest, of course. With their very different personalities, and rare and unique qualities, every one of our children draw from us a powerful and unconditional love. I think you can feel differently about each of your children as you do each of your other family members or friends. But I would never favor one over another. Ever.