Everyone has a reason for blogging... and enjoy different types of blogs. Some like serious and professional blogs others opt for a more personal blog. I have tons of blogs all over the internet. I blog for fun and take more of a personal approach as the blogs I enjoy reading most are the ones that are like talking to a friend. I don't really care how many followers they have as long as I feel that I am talking to a friend.
If you want a free blog you can get one from blogger. If you want to get serious about blogging check in with Darren Rowe of problogger and learn as much as you can. The bottomline is why not try your hand at it,, you may love it!