I finally found some time to replace the now deprecated Google Buzz with Google Plus. And it's probably a waste of time, but I'm just doing it out of completeness.
My personal Google Plus account has turned into a ghost town, just as soon as Buzz. It's sad. That's why I don't understand how there are still reports saying that it's growing. I bet it's just users from various Google products who are signing up and then taking a peek. And then never coming back again.