Why Blog?

So it's been a while since I've posted again and I'm wondering whether or not to keep this blog going. It seems that the original intention of this blog -- to document the journey of turning a bare grassy suburban backyard into a permaculture paradise -- has fallen by the wayside, and now I'm not sure what the hell this blog is about or why the hell I even blog. At the moment I have lots I'd like to write about but I can't seem to get the words from head to screen. I suppose it doesn't help having two little ones tearing around the house interrupting my train of thought every time I sit down. Then somedays I feel like I'm missing out on the fun of a project because I keep thinking 'This will be a good blog post' and become so consumed by the idea of blogging it that I forget to just enjoy whatever it is we're doing.
I've toyed with the idea of starting a new blog, maybe a couple, and keeping a definite theme (gardening, homeschooling, craft etc) but then I think how entwined all those aspects of my life are; I couldn't really split them up into neat little segments like that and one would spill over into another ... just like it has done here. Maybe I should just stop being so bloody controlling with a theme.