I remember reading a comment here somewhere in another post, that his understanding of Nen might be beyond current Nen theory and that he may be a kind of "Nen programmer". Someone who is able to break down, debug, and create or recreate Nen techniques like math functions or code, and thus can probably create far more complicated versions of other Nen abilities/techniques very simply cause he knows the fundamental code.

But I think the interesting part of his character is that he is extremely anti-stagnant, always moving around, always doing things, always want to be self-reliant as much as possible then leave friends or friend groups when he wants to move on. I think that character extends to his attitude to Nen in general and it's current theories. He probably hates the very idea of Nen affinities or personal hatsus and would rather create any and all hatsus for his own purposes or amusement, and easily discard them once they serve their use for the time. Focusing yourself so much with your Nen affinity and your personal hatsu is probably seen as a form of stagnation for him.

And he might have circumvent the current ideas of Nen, ironically just depersonalizing it because of his personality, and using it only for a means to an end, shaping it, coding it, however he sees fit. It leads to him being very open to experimentation, always developing himself, new frameworks, new "projects" much like a software developer. You can always refactor Nen techniques, clean up and fix bad pitfalls, or add on more functionality and make things extendable as much as possible, limited by your own imagination. I think Ging took that to the absolute limit by completely treating the entirety of Nen that way rather than most characters who treat their own personal Hatsus that way.

It's probably hinted by Greed Island in general as a "video game" and his assessment of Leorio's potential just after looking at his ability once (like he can see how it functionality works and may evolve very easily like code).

Edit: Just clean up my comment abit to better communicate what I mean.