Oh yes, I definitely have at least one of those! DS8 has a most astonishing array of opinions about the world for someone who has almost no experience in it! And DD4 follows right in his footsteps, so I'm not sure if it's really her or just the nearness of brother. Everything has to be "just so", and it's a national catastrophe if something different is about to happen.
To be fair, they do come by it naturally.
It's just so frustrating when I can't get him interested in a book or movie or game that I know he would like, because he has this "thing" against it for no apparent reason. I still have many of my books from when I was a kid, and now my kid doesn't want to even look at them, because he's "not a fiction kind of guy". Arrrgh!