Facebook is (probably) going to be announcing some big upgrades on Thursday.
Google+ is nice - I've been using it for a couple of months. Watch out if you use the mobile version, it auto-enables uploads of photos you take on your phone to the Web (you can opt out of this but it's not the default!). On the plus side for privacy, Google+ has the concept of "circles" which helps keep your personal life and professional life very separate - and even different bits of those lives (e.g. in your personal life, conversations you have with adults separate from conversations you have with kids). I know you can do this too with Facebook, but it's a lot of effort. Google+ is built from the ground up on this principle, which I think is a definite bonus ...