Well, ENFps often seem unpredictable to me. The ones I've had problems with tend to shift between being thoughtful and understanding one moment, to giving off strong vibes of condescension the next. It's mixed signals that make perpetually unsure of what exactly they want or expect. They never seem to do things that I would strongly object to, but they just sort of set me on edge and cause me to feel self-conscious about everything I say and do.
It's like they want everyone to be relaxed, yet focused; friendly, yet formal; laid back, yet punctual. They seem to encourage self-expression, yet be openly annoyed and belittling when you say something they don't approve of. Sorry, but if you want someone to express themselves, you have to learn to respond thoughtfully, even if it's your supervisee.
I deliberately learned to just "let it go" when my childhood SLE friend would unthinkingly cross the line with physical roughhousing (e.g., arm punching when you made fun of him, or shoving you when said something he thought was dumb) because I knew that he was a nice person whose friendship I valued, and that he didn't really mean anything by jostling us; it was just his SLE way of trying to sustain a fun Fe atmosphere.
Shrug. I guess I just wish that I'd get that kind of treatment from IEEs.