I used to have one, but after awhile I just lost interest. I guess I figured I didn't want to write a journal afterall. Not because it would be boring or bad, but because I don't want my day to day life being on display. And now I'm addicted to this forum and I just wouldn't have the time.
But I think that people just want to be heard and to hear other humans conversing. It's only natural to want to be around other people, are society is socially built. If someone were really isolated from all of humanity, that person would go insane.