Seems pretty lively to me. Even too lively, at times. I have about a thousand people circled, and am circled by a few thousand. I do post public, but I post more private posts. People in my circles have a similar ration - maybe a bit more public than private, but very similar ratio to mine.
My experience of G+ is that it's a buzzing, lively, chaotic place with the usual fun, or thoughtful, or sometimes dramatic posts. Interestingly enough, I don't have any member of my family posting on G+
At times my experience of G+ can be a bit frenzied, but it's mostly fun. DEFINITELY not boring.