I have found that I am much more likely to comment on my friend's blogs than someone I don't know well or an unpersonal informational blog. I guess that must be my "shy" side coming through. I know my close friends know me and will love me no matter what goofy thing I write, but I don't want to "offend" or "weird out" a stranger. That may be backwards thinking. This exercise is forcing me out of my comfort zone and commenting where I normally wouldn't.
The blog that debated commenters alias vs. real name was interesting. Even though I used my real name for this blog, when I debate it, I would rather use an alias for blog commenting. First of all, Rachel is such a common name that someone could easily be confused by my identity if they have any other Rachels in their life. Secondly, even though it is an opposite reason in a different setting, I may want to keep my identity private in a community I am not familiar with.
I also clued in to Blue Skunk's comment " But I have been thinking about Levin's statement in relationship to a unique characteristic of blogging - that it can be more dialog than sermon." More dialog than sermon. Hmmm. I guess it depends on the purpose you want for your blog. In most circumstances I would much rather have a dialogue with my blog than preach with no interaction. The feedback and communication encourages me to keep writing and sharing ideas too.