Not sure if this is other people's experience too, but one thing I've noticed is that I feel like answers come to me, but from outside myself. I often get a feeling like I've been in the right place at the right time. I'll meet someone, have a conversation, see a poster on a wall, click the right link on a website, and some small, random piece of information will set off a chain that was just what I needed to get to the place my brain needed to go. If you read a lot of Virginia Woolf's essays they show this kind of thinking where seeing something can remind you of something else and lead to all these new ideas. As opposed to Ni, which from how I've heard it described sounds like answers also come to them, but they'd feel like they came from inside. It sounds like ideas just "appear" to Ni, but Ne has to really look for them and form them from something else.
I have a tendency to make associations that other people don't always understand at first. Or I'll say something and the other person will be surprised at the quick change of conversation topic. But the conversation seemed to flow for me, it's just that a couple of skips were made in my head, that looked like a huge jump to the person outside. Coz they can't hear my thoughts. Damn you non psychic people!!
I tend to throw ideas out there, I guess that's brainstorming. I get annoyed sometimes when I make some observation or mention an idea I had, and the other person acts like I believe it's true. And starts picking it apart with an attitude like I'm an idiot for even mentioning it. IT WAS JUST AN IDEA!!!
Also that the "real world" is coloured by imagination. I don't see sunlight coming through the window like I guess an Se would. I see golden coins tumbling through and bouncing along the floor. It reminds me of synaesthesia. Or I might think of the sun and how it's always there and then that will lead onto something else.
I think Ne tends to be kind of playful and silly too. I like pretending I'm a fairy and running around being stupid.
I'm not sure if this is true but possibly preferring activities to relationships. Like you might prefer to go to an amusement park with someone, than sit in a coffee shop making chitchat. You're still together, but one is more social. But I might be confusing that with another preference.
The fact that my posts are so long might have to do with Ne. Too many ideas and too many ways to describe them. Not enough filtering. Saying the same thing over and over again in different ways. sigh