It looks to me that #Diaspora aspects work basically like G+ circles, is that correct?
That is to say, you have a singular profile, but you post to particular aspects to control whomst sees particular posts. And you can filter your timeline by aspect.
When someone adds you to one of their aspects, they only get your public posts, unless you add them to an aspect.
But your aspects are basically one identity, and your control over sharing profile info is basically on/off. Right?