We were all hot on a Google+ account. The registration was not public and those who were registered there could invite friends. Everyone else could look into the tube. To use Google+, you must have a Gmail account and can then activate the service there. With your own email address you could not log in, but were forced to create a Gmail account. A tactical move by Google, who wanted to use Google+, also had to have an email account with Google.
Then there are the Google Apps users, who indirectly retrieve and send their e-mails at Google, each use their own e-mail address or Internet address. In theory, it's the same service from Google, but when it comes to Google's other services, you notice that as an apps user you're not unlocked for everything. It was the same with Google+, but that has now changed.
From now on, every Google Apps user can register with his own email address, register with Google+ and use it at this email address. Actually a positive news, right? Not quite. A few months ago, it happened that users without real first and last names were simply blocked. At the time, Google only wanted to adopt real names. So if someone came up with a fantasy name, it could happen that they have been blocked. After clarifying the facts, the account could be reactivated (but this could take a few days).
The catch was (or is) that the whole Gmail account has been blocked. It was really only about the Google+ account. So the one that happened couldn't get emails for days – which was pretty annoying. So if you used the Gmail account in conjunction with your own blog, you have locked yourself out with this story. This means that it can happen that someone reports to you and give your name is not a real name. So you can be intentionally harmed.
So the safe choice is to create a separate Gmail account and then use it with Google+. In case of a case, only this account is locked out (a few days), but not your primary email account. I know the more email addresses you have, the more confusing the whole story becomes. But in this case, the whole thing makes sense and to get around it, you can also set up an email forwarding. Thus, you get all the emails and still only need to retrieve a single email account.
Photo Credit/Screenshot: Google.de