It seems that whenever I visit Google+, I get a big long screen suggesting people to encircle, like this:
Is there any way to stop it from nagging me about this? Everyone it suggests is either not my friend or not at all active on G+, and it is a pain finding the little "Continue" button at the bottom every time.
Best Answer
Adding people to circles
This happens because Google thinks you don't have enough people in your circles to get the most out of Google+ and is trying to help you connect with your existing network.
Typical for a new Google+ profile. Add a few more profiles or Pages to your circles and it'll stop showing the large pop-up.
Here is something I wrote about "Who sees your post on Google+", hope it helps in the sharing of your posts and content.
Going public is good, especially if you wish to "attract more followers" and thus get more engagement on your posts.