I left Google+ due to their data deletion policies
, Google+ would blanket delete your entire Google existence without warnings if you even innocently did something that they did not like on Google+. Which such a policy, I do not feel comfortable having Google+ linked to the rest of my Google data.
I am a content creator, and I would not like having things on my various accounts deleted cause of a simple policy violation. I figure they still have to iron out the legal issues to do with this, but till they figure it out, I'm out.
For example: If you change your name 5 times (or just correct it), Google says it would delete all your information. I kid you not. Saw this dialog and felt Google+ was not for me. As a content creator, I already deal with similar issues on YouTube, at least there you can appeal.