I didn't even consider ISFP at first but I read this and said omg this is me . I also realized on Best Fit that the ENFP description sounded more than a little too fruity, and that a cross between ESFP and ISFP are what appealed to me, as being "me."
When I actually read Keirsey's PUMII (the book) I realized how much I liked the Artisan temperament versus feeling a little uncomfortable with the Idealist temperament. However, I don't prefer his system, overall.
Other clues: on Dario Nardi's neuroscience of personality I picked the brain areas that correlate to Fi dom, and realized that I respond more quickly and react more quickly like Fi/Se, rather than the Fi/Ne deep listener.
There are systems, like Jung's original diagnostic tool of neuroticism where I'd say I'm ES(F) - Cultural Realist with Ni neuroses, and I'm up in the air on Beebe's 8 function model in being Se or Fi dom...but point being, I realized I'm an Se type, not an Ne type.
I love facts, and I use those facts to move to theory. I'm not entirely sure why I didn't realize this in the beginning and had to go around to my ass to get to my elbow.
I could also only be told "you use so much Te" for so long before I realized they meant Se.
P.S. I still think you're a 9w1