Why do people blog?

I heard about blogging (please believe me) for the first time when I joined Macromedia in July 2005. I created my own blog after Manish sent out a mail to a group of people. As it is with any habit it is difficult to start and it is more difficult to get rid of it. And till now I have been able to blog only now and then but not regularly though I keep getting ideas on which I want to blog.

One such idea is : Why do people blog?

• Is it to share there thoughts?
• Is it the constant desire to communicate?
• Is it to develop friendship with people around the world?
• Is it to reduce feeling of loneliness which always creeps into once mind ?

Why, why do people blog?