Among the most compelling positives about G+ for me is that it's not Facebook. Among the most compelling negatives about G+ for me is that ... it's the emergent evil face of Google. Nothing has changed my view of the company as much as it's exceptionally ham-handed dealings with real identities, real names, pseudonyms, and the like, particularly as expressed by Schmid and Gundotra (with an honorable mention to Horowi…
It's the lesser of two evils. Would you rather facebook (rumored to deal with the CIA/Palantir), or shudder - the government, be the internet's identity provider. In fact, unless Larry and Sergey crash in their planes I don't believe google will actually ever turn evil.
My own familiarity with social networks gives me a strong hope that some sort of social networking interchange protocol can be established which will enable the sort of sharing and disclosure (among friends and common interest groups) we've come to love, while limiting the exploitation by advertisers, spammers, scammers, and surveillance entities many of us have come to dislike intensely.
I see Diaspora as a very significant development to this end.