I've long sworn off Facebook, and have always been rather active on Twitter. I just hope G+ gets a good, functional mobile layout. I'm not sure how I feel about the current one yet.

Everyone I know is on Facebook, and nearly everyone is on Twitter (with more joining just this week.) I have a large group of friends from a web community that all joined G+ at the same time, so, it's a completely valid social network for me, without having to do any work of reorganizing friends from high school who add me.

Basically, for me it's a second chance at adding people on a social network, and this time, with easier tools, I'm getting it right.