There's not much to do on there. I see image memes that aren't interesting. I scroll down to find a "What's hot" box with some boring thing from the NRA. Why does Google think I want to see anything from the NRA?

The rest is news and updates I already saw on Facebook, Twitter, and RSS feeds. This is with a few carefully curated circles. I culled a few people out for flooding me with uninteresting things, but G+ hasn't removed their posts from the stream. The rest are people who either don't post at all or don't post often.

Google Plus came alive for me when I added a Fraser Cain's shared Science Circle: https://plus.google.com/110701307803962595019/posts/CcPsCorM... There are similarly interesting circles focused on technology, futurism, etc.

Now that I think about it, G+ got less interesting around the same time I culled some shared circles I added when G+ launched. I saw this circle share the other day and added it. Now G+ is interesting again. Weird.

I actually get pretty relevant/entertaining things in my what's hot feed.

I'm pretty sure it depends on who you follow, it only takes a minute to search for a couple of your interests and follow them but worth it

Google Plus isn't a replacement for RSS.

I am subscribed to 100+ RSS feeds that have no corollary in Google+ and likely never will.