I agree that Circles seems like a great idea. I've always hated that in Facebook, everyone is either my friend or not. It's awkward to have to decide if someone

I agree that Circles seems like a great idea. I've always hated that in Facebook, everyone is either my friend or not. It's awkward to have to decide if someone is a friend. You either end up with lots of non-friend friends, or you have to start explicitly telling people "no, we are merely acquaintances. Let's be perfectly clear: I am not your friend." That's awkward, and in real life, you don't have to do it. So you shouldn't have to do it online. It's much better if I can group people into whatever circles make sense to me, and they can do the same to me. Nobody should get to see how I group people. It's my mental model of the world, not theirs.