Why blog at all?

I started thinking what to say when a friend of mine asked me this question. Well why does someone blog at all? Is it to improve one's writing skills or is it like a journal?
I have come across different blogs(not many) in the past 1.5 years of my blogging....some were just to scribble one's thoughts(a little like my own)....some were definitely meant to send some message out there, some were for people who wanted a community of their own and some were just for the heck of it!
Coincidentally a couple of days later I saw an article in USA Today which speaks about 2 bloggers whose hobby of blogging turned into a business.Well as much as you guessed they were the "send out your information" kinda ones. In fact these guys are started earning so much from their blogs with people wanting to advertise there that they had to make their part-time hobby as a full-time profession (Check out http://www.usatoday.com/tech/techinvestor/industry/2007-06-19-tech-bloggers_N.htm?csp=34).
And there are these few kinds where you get to hear lots of interesting things - well I infact came across a blog which I followed quite regularly sometime back , just because this guy had all these interesting things (of course not the headlines - I can go to the news for that) , from as small as a business mag. article to a new car, on his blog.
Well I guess I got my answer now - Whether it be for fun or for fake - people just wanna say what they feel like and if you are lucky others might buy your ideas and make you rich and ofcourse you get to socialize too.
So get going !
Happy day!