What makes a good blog and Why do people blog

What makes a good blog and why do people blog you ask? Well here is some resources on why people blog and what makes a good blog.
http://www.43folders.com/2008/08/19/good-blogs.
http://journalism.nyu.edu/pubzone/notablog/story/good_blog/
http://journalism.nyu.edu/pubzone/notablog/story/good_blog/
http://www.webpublishingblog.com/what-makes-a-good-blog-post.htm http://www.webpublishingblog.com/what-makes-a-good-blog-post.htm
http://vandelaydesign.com/blog/design/what-makes-good-blog-design/
http://www.intuitive.com/blog/why_do_people_blog_how_many_bloggers_are_there.html
http://wiki.answers.com/Q/Why_do_people_use_blogs
http://www.enquire.org.uk/youngpeople/wordpress/?p=47
http://nogoodreason.typepad.co.uk/no_good_reason/2007/05/some_more_reaso.html