I don't think ENTP's always "cause a ruckus". My graduate student teacher for one of my classes is definitely either ENTP or ENTJ (and I'm really thinking ENTP), and well, if she were unruly she wouldn't be a grad student. She seems like a pretty together person who takes things seriously when she needs to. But she's always saying things in a witty way and making people laugh, and she's great at being the devil's advocate and presenting both sides of an issue. And my ENTJ ex's default mode is mischievous. It's best not to take generalized traits as rules; rather look at the underlying causes of the traits. Also remember females are going to exhibit the traits differently than males, and the thinking types' descriptions are based more on males.
Ne+Ti has a mischievous streak which is distinctive from Ne+Fi, and Ti-Ne and Fi-Ne similarly have distinctions. Ne generates possibilities and loves absurdities. Ne will take in information around her, but also from inside her own mind, and put it together in interesting and funny combinations; the laughter generated from unusual combinations of things is further Ne stimulation, especially if other people laugh as well. When ENTP's are being serious, they are using their Ne and Ti together to make sense of the world and make possibilities into reality (usually in the mental realm, as opposed to ENTJ in the physical). The distinction with Ne-Ti is that their mischievousness (Ne) is tinged with Ti, which lends an intellectual edge. They're going to want to develop clever schemes to produce funny results, or shake the system up, or present novel and revolutionary ideas, or simply play with people's minds.
ENFP's have Ne+Fi, which means that their Ne play will be tinged with emotions. I know Fi is not about emotions, but nevertheless it happens this way when people exhibit it most of the time. ENFP's aren't going to be really emotional creatures, indeed Ne makes them really too mental to be; but they will have a lot of attitude. They have things they feel strongly about for the moment, and some things they really believe in. The things they say and do will be influenced by their personal attitude toward things. They will usually generate humor by being outrageous, rebellious, silly, overdramatic, quirky, or telling what they see is the truth in a funny way. They make sense of the world qualitatively, which means that they are organizing information according to how they feel about it. ENFP's are mischievous in a provocative or silly way, but they are harmless. With ENFP's the emphasis is on fun. ENTP's have a little more trouble getting out of their heads.
INFP's are Fi-Ne, which means that they are more often serious than silly. That is, they will be making sense of things qualitatively first and generating entertaining randomness second. Their reaction to something may be to take it seriously and say how they feel about it, or what things should be like, when an ENFP would just make a smart ass remark. Their brand of mischief is a little more either Fi (like being sarcastic and absurd in a kind of pointed emotional way), or inhibited Ne, like playing word games and saying little silly things. They aren't flamboyant like ENFP's. They also like to shake up the system and broaden people's minds, but it's usually in a more agreeable and serious way than ENFP's.
INTP's have Ti-Ne, which again means that they will more often take things seriously than just be silly. They have to make sense of everything before they can just be random. They have kind of a fear of just letting go and being crazy most of the time. Their Ne entertainment is a more subdued kind of ENTP mischief; they like playing with words, making witty remarks, expressing logical/factual truth in an entertaining way, being subtly provocative, and playing with people's minds. But they have a more intellectual or just quietly absurd humor. I think INTP's are more likely to laugh about objective aspects of a situation, whereas INFP's might be a little nervous with such objective truths, especially if they involve people's well-being.
Hope this helps. This is just one aspect of what you describe, but I can gladly analyze the rest.
Is a big reader, clever. People go to her for advice. She can be strong in her opinions but doesn't squash people. She dresses pretty and a bit scruffy. She says she's done the online tests but doesn't relate to anything she comes up as fully, and comes up as a wide range of different types (from ENTJ to INFP!) What do you think? What would I need to look for to find out what her leading functions are??
