I hate blog posts that sound like they might be educational, but end up being nothing more than attempts to get conversation going. That strategy is welcome in a forum, I do it myself all the time. But blogs should be an offering of knowledge, opinion, or just interesting thoughts, not a plea for readers to supply same.
Here's an example:
Do You Really Need Photoshop?
It has a great title, and got linked from another blog (the point, I expect). But the title question...