Is Blogging your thing? Y?

Is blogging a new form of expression or are we narcissistic that we need strangers to read our thoughts, or are we so lonely we're willing to write on a blank space with hopes that someone out there is listening, or is it therapeutic writing for the sake of clearing our heads and what our technological generation considers a dairy, or do you blog to share a talent, an idea, a message? Why exactly do you blog?