Eh. I hate all thoes 14 year-old girls who post EVERYTHING about themselves on it, dont set it to priviate, Accept anyone who wants to be their friend, practically asks for a stalker...etc.
I use it mainly for writing. The whole Blog Idea is a great way, in my opinion, to share what you write with anyone who cares. And even if nobody cares, it's still out there. That should be enough =D