I don't really have a social life in real life, so online social networking is all that I do. Basically I am not much of a society animal. I like to live my life my own way at my own pace so online social networking works fine for me. I go online when I want to and I go offline when I want to. With real life social networking, I would have to deal with people calling me on the phone or knocking on my door.
Victor, I am the same way, however, instead of not being much of a "society animal", I am a very social individual, it's just really annoying when you get someone on the phone or from a walk-in whom you have to explain something 100 million times to.