How real is your virtual personality?

Can you judge a person from her/his writing? Does this blog give you an estimation of my real personality? Is it possible to have a separate real and virtual personality?

I was amused, yet another time, when an acquaintance announced his verdict about my personality purely on the basis of my style of writing. We haven't met ever or spoken much. I was more amused when another acquaintance made a much bigger claim on my emotional being through my blogs.

Ridiculous...I thought. But I don't discard the observations completely and I wonder

how much can this blog say about me. Does it convey my real world personality or am I subjected to being judged by my virtual one reflected through this space? Can these be different at all? If not, then how come Sir Arthur Conan Doyle, the creator of Sherlock Holmes...was not a great rational personality himself. He believed in fairy tales and occultism.

Sure, the recurring themes can say about the way you think. And I agree, it is difficult to keep 'yourself' completely apart even if you are writing a fictional piece. But how good is this the indicator of your entire personality or character?

Handwriting does tell a lot to a large extent. The logic there is that your 'ego' is active when you are writing though the degree varies. But a writer might be taking a refuge in his/her style of writing. It's like purposely having a different virtual personality. Being something you are not to the real world. Isn't that the reason 'cool_gal', 'handsome_boy' or 'crazy_xyz' very common email ids...especially of people who have totally contrasting characters otherwise?

It'd be fun to analyze fellow bloggers and get a check on the observation! :)