G+ is the best of both worlds. Particularly with photography, I can easily follow (and be followed by) far more people here than Facebook, and I don't need to click a link to an external site to see their work. Plus, the G+ photo interface is far superior to Facebook's. Of course, I'm biased and that is one of G+s strengths, and it won't apply to all interests. However. the ability to quickly and easily group people, particularly as you get into hundreds or thousands of people you follow (not that I'm there) is much more effective with G+ than Facebook, and that DOES apply to everyone.
That said...I still hang with the Facebook crowd mostly, because that's where people are.