I've had some brief contact with one ENFp woman this summer. Her personality is such that I could see a lot of people claiming she's 'high maintainance', but I would disagree. She's very active mentally, and very chatty, but I didn't find her tiring at all. Also one of the nicest people I've met in a LONG time - whether that's duality or pure coincidence I can't say.
Often she would interject with self-deprecating comments about how 'silly' she was, or statements of how much she was just 'blathering'. This provided an excellent opportunity for me to come out make a friendly gesture, "Oh no, not at all, I find this interesting, etc." - something I've taken to frame as her trying to draw me out, or gauge my level of connection with her in terms of Fi. At least, that was the effect.