The MBTI originally pinned me as INTJ, which I think most aligns with my ideals. Subsequent tests gave INTP and INFP respectively. The difference between T/F and P/J is marginal. I think the interplay between functions may be more circumstantial for me than others, or maybe I let my personal life spill into my reflection and that muddles my results. It's hard to say. Socially, unless the focus is strategy, I take an INFJ stance and become the constructive empath; if the focus is strategy I revert to INTJ and can be a little domineering depending on my company. I'm fairly certain Ni is my dominant function in most cases, which is why I've stuck with INTJ. Many themes attributed to INFPs recur in my life, though, such as giftedness in interpreting and creating symbols and an emphasis on value over hard logic. An especially striking characteristic of INFPs I share is a tendency to "assume unwarranted familiarity with a domain because my global, impressionistic way of dealing with reality failed to register sufficient details for mastery." I think in this way I differ from INTJs, despite my values leaning more toward thinking and judging; I place significantly more value on understanding than memorization; the interplay between components is magnitudes more interesting than the components themselves.
I could probably ramble indefinitely, since I tend to short circuit on this topic, so I'll end things here: is it possible to boil down to an INXX, or is everyone presumed to fall predominantly under one profile? If you have any input/conjectures/questions based on my writing style or logical flow I'd love to hear them.