I've seen this said before on other forums, that ENFP and ISFP have some similarities, can superficially seem more alike than ESFP to ISFP and ENFP to INFP.
This, I believe, may be due to cognitive function mix-ups and misunderstandings. I still have moments when I wonder if I'm an ISFP who uses so much Ni that I get into Fi/Ni loops and analysis paralysis sometimes, therefore looking like an NF.
I'm sorry for the cross-post, but this is an explanation of what happened with me:
I'm curious as to how many ENFPs and ISFPs have experienced this.I went through a phase of entirely rejecting cognitive theory because it started to seem equally plausible that I could be ENFP or ISFP...am I forceful and fond of stating things plainly because of tertiary Te, or auxillary Se? Am I an introverted extrovert i.e. ENFP or an extroverted introvert i.e. ISFP (both seem highly likely)? Do I want experience because of Ne or Se? Does my penchant for literary analysis come from an Ne dom, or just a firm command of tertiary Ni? Etc. Etc.
And even when I take cognitive functions tests though I'm high on Ne, Fi, Ni, and Fe...the strength of my Se begs the question of how much I really am preferring it? Lord knows I've seen someone who is clearly using a buttload of Si and Fe think of herself as INTP when it appears to be the furthest thing from the truth. Is this why some people think I'm ISFP and not ENFP?
So I just said, forget this, I'm going with my dichotemy preferences...but it turns out from taking various dichotomy tests that even those preferences appear to be pretty strongly NFP, though fluctuate on I/E.
It always seem like the stereotypes DO come into play when deciding between two types...well, this person is so opinionated that ENFP seems more likely than ISFP, you know.
Gah. I'm pretty sure that I'm more NF than SP, though, if we divide the four temperaments.