How should a blog post look like?

Just writing a blog post is not enough. Reviewing my own posts I noted that there are some 'real' blog posts and some more 'article' or 'book page' like posts.

The length of the post are way to short. Most are more a personal note then something others would like to read.

I guess I should make more differentiation between my posts. Either by creating node types or a category. I opt for the first one. This way the blogs become personal again?

Hope this helps to organise my own brain.