I think the best way to explain our differences is that we have varying preferences for specificity - I like "blogger" because it means "author of a blog post" the same way that I like "commenter" as "author of a comment".
And yes, just because you like the more generalized description of "author" doesn't change that they'll all 3rd person labels, which I'm not sure is pejorative either.
And yes, just because you like the more generalized description of "author" doesn't change that they'll all 3rd person labels, which I'm not sure is pejorative either.