My new favourite read is simply entitled “Style Guide”.
As a blogger, one of the things that drives me crazy is reading my own posts from a few days or weeks earlier. How could I have been more clear and understandable in what I wanted to say. The following paragraph is indicative of what I am reading.
Do not be too hectoring or arrogant Those who disagree with you are not necessarily stupid or insane. Nobody needs to be described as silly: let your analysis show that he is. When you express opinions, do not simply make assertions. The aim is not just to tell readers what you think, but to persuade them; if you use arguments, reasoning and evidence, you may succeed. Go easy on the oughts and shoulds.
I have found blogging brings all sorts of responsibilities, in a good way, but the most important one is to be understood.
Bankwatch 
“Those who disagree with you are not necessarily stupid or insane.”
Not necessarily. But they COULD be. 🙂
One thing I would quibble with, though, in the paragraph you cited, is that sometimes a blogger is just telling readers what s/he thinks.
Too much persuasion — regardless of how well constructed — can be a bit much to take (I’m thinking of a particular blogger or two as I write this).
You are too right Ron … I would also believe, the last thing should be for a blog to lost its personality, which is the personality of the writer. I love the “COULD be” !!!
I think about your blog, and it has a very clear personality … for me, I struggle with wanting to write simply, which of course will reflect my personality 🙂