What Social Media Would I Choose if I Only Had One Choice?

I am not one to really post anything to any of the Social Media's, but I do like to use them to keep up with different things/people in my life. If I had to choose just a single Social Media I would probably have to go with Facebook. The reason for going with Facebook would probably be due to the fact that no one I know really uses Twitter, and I do not have any interest in Pinterest.