Google+ = +You
Be yourself on google.
But you are different to different people. You have circles on Google+ You can be a writer in your writer circles and a zombie in your zombie circles.
Know what you want in your life. Know what you want from Google+ and Google+ can be that for you. You just need to know the right chrome extensions and the settings. If you want it to be like facebook, it can be. If you want it to be like twitter, it can be. But have patience, especially if you want it to be like facebook because your friends are gonna take some time to be on Google+.
Your life is boring if you don't have a good circle of friends. The same with Google+. If you don't have interesting people in your circles, then your stream is definitely going to be boring. Go find some interesting people. More the merrier, interesting the better.
They say "A man is known by the company he keeps" . In G+Arena we call it "A plusser is known by the people in his circles and the people in whose circles he is". You find some interesting people circle them and through them you find more like minded interesting people. For the second part(to be in interesting people's circles) keep reading.
When you see a bunch of people discussing your favorite topic, you join the conversation. When a see an interesting post go drop your opinion,add value. Adding comments to a post can be a great way to find like minded people. And once in a while skim through the comments of some interesting posts and you will find many like minded people who fit into your circles.
When you have too many friends, if is difficult to catch up. This can happen to you on Google+ too. Don't be in a hurry too add to many people into your circles. Thanks to circle sharing, if you are adding hundreds of people in one go you are not doing it right. Even if you want to circle people from shared circles, I suggest that you go through their profiles before adding them to your circles.
If you want to be famous, you must be interesting enough. If you are on Google+ to build your followers, then you must post interesting content regularly in whatever field that interests you. There is no shortcut :P
I am not popular but I am happy. I don't have thousand of followers on Google+. But I am still happy with Google+, because it has given me a chance to meet and converse with many interesting people. If not for Google+ I would never have been able to exchange a formal greeting with them, forget about discussions.
Live life your way. Don't follow others advice when you are happy with your life. Similarly all these are just my experiences that I thought might help you too. But if you are happy with Google+ the way you are using it now, I see no reason you should follow my advice.