[msh]

I was not that big fan of circles, made sharing with the wrong people easy.

I like that my personal life (facebook) and professional (linkedin) is two different networks. Its hard to accidentally share the the bad joke with my professional network.

[lotharbot]

I think something like circles could be done right -- if each circle had a custom background, etc. so that it looked and felt like a different website. I'm not worried about posting political rants to LinkedIn because it's obvious I'm on LinkedIn rather than FaceBook or Google+; I wouldn't be worried about posting to my coworkers group if there were very obvious signifiers that I was in that group.