Just how many blogs does one person need?

I have four blogs.

I don’t know why I have four blogs. Actually I do know. I have a blog for different interests. But now I think that defeats the purpose of a blog.

A blog is supposed to be a for expression of an individual. By having separate blogs for everything I have effectively made the blog impersonal.

To have four blogs also means when I write something on one blog I am seemingly neglecting my other blogs. Put another way my other blogs seems to be not moving along.

In short then I have come to the conclusion that a person only needs one blog. Any more and you are spreading your efforts everywhere.

The question now is should I use one of my present blogs or start afresh with a new blog.