I saw a post recently that listed three things the author never wanted to see on a blog. They were personal medical procedures, politics, and bashing. I argued one point in the midst of the political negation. She said she thought readers didn't want to know what an author thinks or believes or experiences, they only want to know about the next book or how they write what they write.
So let me put it to you. Do you care about what authors think and experience outside the realm of writing? Are there topics, not listed above which you are sick of reading or never wish to read about?