The most exciting social networks start with T’s.
Twitter and Tumblr galvanize user-creation while Facebookers live in a world of passive sharing and friend feeds.
If you want to say something, share it with the world. Your friends already know what you think, each post just reminds them of that.
Branch out, go public, and express yourself to the world. There’s thousands out there like you. But don’t be surprised if they find you first.