(answer to the question "what is unique in blogging ?")
I use the term "blogule" for my small blogs. Red or white depending on my mood, not very important by themselves but somehow vital to me. As an author, blogging is part of what I call my "junk writing". And I enjoy it because as ugly as it seems, it can taste good and fulfil you. I need to zap from actual writing to junk writing to keep my balance. Because at the same time, blogging is like gymnastics to me. It's a quick fix when I need to stretch or let my mind wander on any topic I want.
You don't have to bother about the structure, nor the big picture. I've been blogging for 4 years but at the beginning, I didn't want to use a genuine blogging platform - that was frustrating and stupid considering the ease of use / instantaneity of blogs.