What is a blog?

Before a month goes by, I need to find the truth as it relates to blogs. I have started and stopped a few blogs over the past years and I can't figure out why I lose the passion and excitement after a few months of blogging. Maybe the fact that I am not getting paid to do this and I have a lot of other outlets for my time, and the fact that nobody reads my posts. I read a few other blogs regularly and the style and substance of posts varies greatly. Some are analytical on the topic of the day, others are related to personal experience and others are just there. It seems like blogs and the act of blogging are just the technological extension of the personal diary, albeit some with a twist. I kept a diary/journal during my year in Iraq but I had no desire to share that with anybody. It was more therapeutic for me, a space to write down frustrations and observations and maybe come up with some remedies. I consider myself fairly knowledgeable about most domestic and world events but who the hell cares what I think? So, here's my post on my blog and I can say whatever I want because no one is going to read it.