Seems strange to discuss blogging in a blog, but the more blogs I read the more I see how the creative nature of blogging is infections.
I enjoy the freedom of writing a blog - no referencing, no peer review just writing. It's like a conversation with yourself.
I kept a diary through my difficult childhood but destroyed them when my life got better because I did not want to be reminded of dark times, but I wish I'd have kept them as I think it's important to see how differently I see the world now. More importantly, I see myself differently now and blogging and keeping my research diary (which is an important part of quantitative research methods) has become a pleasure for me.