I read some of her posts and was amazed by her elegance and style (not to mention, for once, an astonishingly rich and appropriate use of the English language!).
I knew it.
I had discussed with her on forums and read "behind her back" her posts in threads I had not contributed to.
But a discussion is different, faster, it is an exchange of different opinions. It is answers and reactions...
A blog, for its nature, is much more personal, whether or not it opens the opportunity for discussion (via the comments). A post in a blog is aimed at itself. It suffices.
I am still a newbie in this and still refrain from replacing my usual writing for myself with this world-wide blackboard.
But if you ask me why bloggin is worth the effort, I will answer you to read Britical.
You don't have to agree with her (I occasionally don't myself) but it is worth reading a brilliant brain at work.