Just added this to my long page on MBTI:
Here's how changing the letters affects the functions:
E/I: blocks maintain same order, functions in pairs switched (2,1; 4,3; etc) (Keirsey: "least important dichotomy")
S/N: same attitudes in place; perceiving functions swapped (and also reversed in tandem order) and take opposite attitude (types will "see things differently", but judge the same way).
I Types: primary/shadow "arms" (i.e. perceiving function) are swapped and reversed - 1,7,6,4,5,3,2,8.
E types: primary/shadow "spines" are swapped and reversed 8,2,3,5,4,6,7,1
T/F: same attitudes in place; judging functions swapped (and also reversed in tandem order) and take opposite attitude (types will see things the same way, but "judge things differently".
I types: primary/shadow "spines" (i.e. judging function) are swapped and reversed - 8,2,3,5,4,6,7,1.
E types: primary/shadow "arms" are swapped and reversed - 1,7,6,4,5,3,2,8
J/P: same attitudes in place, but the blocks swapped between primary and shadow with pairs reversed; all functions taking opposite attitudes (total shadow opposites; most drastic dichotomy switch: 6,5,8,7,2,1,4,3)
E/I + J/P (two middle letters the same) same processes in place with attitudes reversed; even swap of four function primary/shadow ranges (diametric attitude opposite: 5,6,7,8,1,2,3,4)
S/N + T/F (two middle letters changed): All eight functions reversed in order (attitudes fall into the same places). Most diametrically opposite type, cognitively: (8,7,6,5,4,3,2,1)
E/I + S/N (first two letters) judgment compatible only; spine becomes arm and is replaced with shadow arm as new "spine" with pairs reversed: (7,1,4,6,3,5,8,2)
E/I + T/F perception compatible only; arm becomes spine; and is replaced with shadow spine as new "arm" with pairs reversed: (2,8,5,3,6,4,1,7)
S/N + J/P reverse perception compatible (same primary perception functions; arm reversed and becomes spine, and is replaced with shadow spine as new "arm": 3,5,8,2,7,1,4,6)
T/F + J/P (last two letters) reverse judgment compatible (spine reversed and becomes arm and is replaced with shadow arm as new "spine": 6,4,1,7,2,8,5,3)
S/N + T/F + J/P (opposite intelligence type, same attitude): Even block swap within primary/shadow range. Next most similar type after E/I swap: (3,4 - 1,2, etc.)
All four dichotomies: Swap of four functions within primary/shadow range: 4,3,2,1,8,7,6,5. Technically "ego-compatible", but will clash as diametrically opposite ego-syntonic types. Yet, as the 3rd and 4th functions develop, they should "grow towards each other".
So Jennifer, I can understand you not getting along with an ESFJ (and as you see, it has gotten easier with mature ones), but how would you be drawn to ISFPs instead? (though in outward behavior they will be similar: introverted, informing and pragmatic, so perhaps at that time the cognitive side of it didn't matter then?)