Good blog post rule: write the 1st draft when you are full of emotion (anger/love/etc). 2nd draft, edit it some. That will let your writing speak with energy and purpose without making lots of typos and using bad logic.
Why read blogs: For the opinion of the writer and the (actual and perceived) relationship I have established with the writer.
Coming Back: Stuff that interests me and will impact my life.
Compelled to Comment: (1) If I disagree, I will comment. (2) If I want to help, I will comment.