Why it's sometimes easier to write novels then blogs

I’ve never thought I will write a blog one day. Blogs scare me. Writing them, that is. Which is kind of funny when you consider that I’m a writer, someone who’s supposed to write. Anything. Anytime. But the problem with blogs is that they demand special intimacy with the reader, opening oneself, sharing private thoughts with the whole www. But that’s what the writers do for living anyway, right? Actually - not really. It so much easier to write books. You can hide behind one of your heroes, or even better - between several of them - giving each one a little piece of yourself. Pretending that the thoughts you write are theirs, not yours. That those not-so-perfect character traits are theirs. And the dreams. And the fears. Through the mouths of your characters you can confess all your darkest secrets, say all the things you would never dare say yourself. Tell stories from your past that you never told anyone before, the embarrassing ones included. It’s so much easier this way. In novel-writing public and private blur. Even if somebody rightly guesses that this part of character XY is actually you, the author, you can always pretend to be insulted and exclaim (throwing your hands in the air at the same time) - “Me? How dare you!”. I’ve been asked several times by my readers if such and such character from my book is myself. “of course not!” - I’ve answered every time, lying on several occasions. Because they are in part all me. But hey, proof me anything ;)

Most writers put themselves into pages of their books. They will rarely admit it though.

Dostoyevsky just like one of his heroes was a compulsive gambler, finding metaphysical pleasure in the addiction. Graham Greene has portrayed his own affair with Lady Catherine Walston in his novel “The End of the Affair”. Ken Kesey was inspired to write “One Flew Over the Cuckoo's Nest” after volunteering as a lab rat in a CIA-financed study measuring the effects of psychoactive drugs, like LSD and cocaine, on people. Sometimes those autobiographical parts are easy to find. The critics call it a “roman a clef”: a novel with a key. Actually the more biographies of writers I read the more I think that there is not that much of fiction in fiction.
ion writer used to hiding safely behind his characters - write a blog?? Where to draw a line that I have never drawn before between the “private” and the “public”? I guess I’ll have to figure it out somehow... (and I would appreciate all the tips:) )