Well, one reason why ENTP's talk so much is because when an idea occurs to me from within (which might be Ni), I just HAVE to throw it out to 'the panel' (the world in general), to bounce it off things and see what it hits and what comes of it, so my Ne can then feast on the results. Then again it might not be Ni, because often it's something someone just said or something I looked at that made me suddenly think "Wow, what if...?" and again, I have to throw the thought outward, to watch it bounce like a game of pinball. Or if you like, kinda like I'm playing football, and I'm like the referee and the balls are ideas, I can just sit there and hold onto them, or I can plant it on the ground and let the teams kick it about and DO something with it. I've GOT to put it out on the line, I HAVE to see what will be made of it.
This someties causes friction for ENxP's because when we see someone else expressing an idea we assume they're doing the same thing, and start kicking it about, only belatedly realising that they just wanted to sit and hug the 'ball', or have everyone say what a nice ball it is LOL
I like to put things out into the field to test them, so to speak, to sorta plough, sow, grow and reap in super fast motion. My first instinct with anything is to throw it out and see what springs up; to bounce it and see what comes back. I think maybe Ni's first instinct is to turn it inward, mull it over within yourself and see what you can make of it.
I just basically exist in a state of constant data gathering without even knowing it or doing it consciously most of the time. If I ever make a movement or say a word, it's usually been decided on after having considered dozens of external factors in a split second that I was only barely aware that I took in, but I did take them in, completely. I kinda think that's why all the best drivers I've known have been ENxP - having to concentrate on so much at once and just react instinctively to it all at high speeds, it's kinda what we're born to do.