Why Blog?

As I look around on the internet, I see many blogs.  Some are out for money .. some for notariety .. some to track weight loss .. some to focus on issues.  Why do I blog?  At first it was just very COOL!  To be able to type in one's thoughts and have them out in the world.  Gradually .. it became a way to share pictures and to communicate with family. Now there is facebook .. so really the question is .. why blog?  Truth is I don't know .. but I think I will continue to do so.