I have been reading some of my old posts and they seem to fall into three categories, stuff I discover thats great and want to tell the world about, stuff I discover that sucks and want to tell the world about and stuff I don't want to forget. 

For me it is theraputic writing about something that sucks, afterwards I relax a little in the knowledge anyone else can read my account (if they google and find it). What is really good is if others contribute their contrary views by commenting because then I have to rethink my original view and decide if I was wrong or right.