So I know two esfps that have OCD-like symptoms. Or similar to.
They have described it as thinking way too much about things and getting anxious when things aren't right or make sense to them. Mix OCD-like tendencies with ADHD and you get a real nut that can't sleep at night because they can't shut off their own thoughts and worries and stupid little things that they don't have a lot of control over.
Is it that by its indefiniteness it shadows forth the heartless voids and immensities of the universe, and thus stabs us from behind with the thought of annihilation, when beholding the white depths of the milky way?
I'm an ENFP and have a tendency towards being paranoid (not voices in my head or anything but like overly self concious, assuming people are talking about me or looking at me when they aren't etc.) and my dad is an ISFP and he is bipolar. I'm going to have to disagree with INFPs being histrionic.. depressed would be more suitable. Also many INFPs and ENFPs have add, which I also have.
Hm. Given Wikipedia's definition of Schizophrenia, I guess I am... Mildly. (Hooray for the Ever-accurate infallible wikipedia!) Honestly though, I would say paranoia would be more like an Si/Ti combination directed by inaccurate Fe. Hence, INTP.
INTP, Neutral Good/Lawful Good even split. 5w4 sp/sx melancholic/supine, even split. Yes, I stole this method of placement from black cat.