Okay...my mum, I have decided is an ISFJ, but really REALLY unhealthly, so she doesn't really count, because mostly I find ISFJ's rather endearing, and just plain lovely, if some times a bit convential. Worrying seems to be their natural state, but they make me want to cuddle them.
In my mum's case, "emotional" doesn't begin to describe it. Really. And I'm NFP. And she used to do this thing where she'd just go over and over....and over the same thought. Like a broken record. So bad, and so often that a psychologist suggested I'd have to move out and break contact, just to maintain my sanity. She had hella fe too...a nightmare for a Fi. For 17 years I lived through every mood swing, and I had to be a virtual mind reader. I do believe she was an exception, 'cause ISFJ's tend to be gentle souls in my experience since.