There's a lot of stuff I'd rather have divorced from my the name I use at work. And, the relationship between my gmail account and Google+ is just too close for comfort. The first time Google+ suggested I add a board member to a circle I nearly fainted. Finally, I have concerns about the way the +[username] feature works.

In short, I'm not persuaded that Google+ is going to be any more secure than Facebook, so, I'd rather keep my presence on both of those platforms pretty light.