GAG by a longshot. I have facebook but I only use it just so I can register in places online. I downloaded Tunblr but I stopped using it. All the girls I was chatting to just stopped responding anyway. I also downloaded Twitter but I barely if at all use it. And I don't even know what that Instagram is for.
I like Instagram because I can see pictures of places from around the world. As a joke I say I am in Mexico or Brazil depending on the pictures I am looking at. I like how I can look up places to see how they look like.