People have different hobbies. Some collect post stamps, others sing in a choir, go fishing, knit, watch butterflies or do any other activity, that makes them happy. It took me a lot of time to realize, that blogging helps me stay sane and brings me happiness. I have created and deleted many blogs, because I firmly believed, that a person must have one blog only and devote themselves fully.
I would create one, then think of something else, create another one, and the same would repeat until I end up with five or six blogs simultaneously. I saw this as a mistake. I even wrote about this here in The Daily Ounce.