I am an INTP personality, apparently.

Whatever.

Harry Potter Personality Quiz by Pirate Monkeys Inc.
Oh, so VOLDEMORT!? hjfsdajfasdhfhadfjhadkp
++ATH
NO CARRIER

And another quiz (more based on the books) says I am

Which HP Kid Are You?

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Yesterday upon the stair
I met a man who wasn't there
He wasn't there again today
I think he's with the CIA