Self Imposed Censorship

Just reading my last entry I thought; how much am I willing or should I divulge my personal thoughts on this blog ? I suppose there is a sentiment towards letting people in to a little of ones personal life without giving too much away. What is a definition of a blog then ? Some of the most sucessful blogs contain titalating articles about ones self. For other sucessful ones they contain initmate descriptions about their lives by remaining anonymous. My question for those that do is how anonymous are they ?