I primarily use SL as a purpose driven medium to help folks out, especially of the TG, Objectivist, or atheist kinds. It's hard to connect on a 2d medium when often the methods to communicate vary greatly. In essence, Secondlife, for better or worse, provides a single platform to derive a multitude of socializations, which is why it's also the most efficient as it as well despite some of its flaws [such as the lack of server clustering as seen in MMOs when a zone gets too many players, and etc, or the lack of an open standard use like OpenGL or YAML, and so on]. Since we're animals of 3d space, Secondlife tends to attract the younger kids that do need help and friends. :3
-- Brede