Could this be somehow tied to Se, or at least more likely for Se than for Ne in general? Although not Se-lead, FiSe Michael Jackson had a similar single-trajectory focus, near obsession with perfecting his one craft. One of the few people to have written a note to himself about all he was going to do in the future and then actually do it all. I haven't really delved into how much Fi-lead influences this too, just an Se observation for now. From what has cropped up so far in the discord discussions, it seems Se may have some sort of trajectory-power which Ne lacks.
I look forward to further input here, especially from the Ne leads. Do we all float around with no aim other than fun for the hell of it? ;p

Your story is really touching, @Animal !
To be honest, I'm not sure if Se has more of a trajectory focus than Ne. I don't have that much of a trajectory focus and I am SeFi.
I did study hard to become a lawyer and I put a lot of effort into it. But I am also pretty much open to any alternative that would be decent and bring a similar income. 🙂 So I don't have to remain a lawyer for life or even to remain in this field; I would do something else if I saw any better alternative.
But I am focused. I can become obsessed of stuff. I just usually get obsessed about stuff that has nothing to do with my career. 🙂 And I couldn't make a career out of the type of things that make me obsessive...because usually what gets me ticking is somehow on the spiritual side. Or has very little practical use. Like once I got obsessed with what the order of the Major Arcana in tarot meant. And I was reading everything about it. Tarot history stuff. And arranging and rearranging the cards on the floor. You know, like a lunatic. :))
And I couldn't make a career out of this type of stuff. At least not in Romania and not having the family and the background that I have. I can't say it would have been impossible, just that it seemed very unlikely to happen. And I am pretty realistic. So I decided to have a normal job, try to obtain a good income and to have enough excitement at work in order to not feel bored...and well, explore the stuff that I liked in my free time.
But since I am quite focused on what is happening each moment, I sometimes lost focus on the type of things that bring me in obsessive state and became more focused on work. 🙂 Though my job is, as I probably mentioned before, not a vocation. But it is pretty exciting and has fun parts. And I can focus on it and work on improving myself and on learning more legal stuff. It's just that I still can't see it as a..calling.
But it's not as if I would dream all day long to do something else and I wouldn't do it...I have no idea what else to do. And my job is pretty good compared to most jobs. I am collaborating with very nice people, I am being heard and respected, things change all the time and I have to adapt. I'm not highly fascinated by legal issues but I enjoy the general atmosphere, the action, the tension, the urgency, the focus, the revising, yeah, it's not perfect but it's good, it's a good job, I would be ungrateful to say otherwise.
I think maybe you are more trajectory oriented because you are actually more J than P. Because you have two J functions developed and only one P function. Do you think this could be the case?

@Shelley Lorraine, exactly ! It's the same. I love some topics and get into research mode and obsess about them for a couple of weeks or maybe months, but after that I usually get out of that state and get back to my more normal way of operating - enjoying life and looking for new ideas and opportunities.
I'm curious about your witchy group. I would love to be part of something like that. I have some friends who thought we should start meeting up and trying some spells. 🙂 Like very soft spells, attracting love and happiness and stuff like that. Or just purifying our minds. (Who am I fooling? we are actually trying to obtain world domination by black magic, using intense focus on a flipped pentagram and luring evil spirits with our high sensuality, in order to trap them forever and ask them to do our bidding :)) ).
Anyway, we didn't try any spells yet. 🙁
But I tried some on my own some time ago. There was a kissing spell that came true. :))
We should maybe open a new thread about witchy things? 🙂 <3
Oh, maybe they aren't necessarily spells, but an attunement to Nature or to the Universe. I just said spells because me and my friends were actually really talking about spells and because you mentioned witchy things, so I made that correlation but it might be completely wrong. 🙂
So, a thread about witchy things, not necessarily spells. <3

Purpose? Yes, but it's an abstract sense of purpose, so there are multiple means by which that could be fulfilled. I don't have a sense of I must do ___. It's a little bit more about what needs to be done to make the world great balanced against what I need to be happy. 
During bouts of depression, all of living feels purposeless. Not my life specifically, but existence itself.

I definitely do but before about a year ago, it was "I will do this one day!" for decades. That turned into angst and self-sabotage in all the things I was doing to avoid doing what I have been thinking about since like 15. That changed in 2017 but it really came to a head in 2018. Now that my life is more and more aligned (and aligning) with that inner sense of "what I should be doing with my life", the trajectory is getting sharper and more linear, bringing in all the other things I wanted to do but also didn't do, in a weird woo-formed (it feels like) grand plan. It had never occurred to me before they could all be part of one story. They seemed so scattered. It's interesting to witness.
I think for Ne, the trajectory is first about "finding what I should do", before it can turn into the linear pursuit of a destiny that looks like a 'trajectory'. Problem is, that first phase can take a person decades to their entire life! Which is its own special struggle. What I've discovered for myself is that I always knew what to do, deep down. I just didn't allow myself to know it, really hear it, and trust it. The twinkling lights of other ideas, thoughts, notions, possibilities, always managed to make it murky, not to mention ideas/notions/fears from society/family/friends etc.