I'll get around to a more specific breakdown of all that there is to unpack here later, but for now let me just say holy moly; you have a talent for writing this sort of prose.
Mechanically... well, given the nail, our genetic heritage, and the state of the world I suspect there's going to be a lot of opportunity to brush shoulders with all manner of memetic hazards. In light of that, I'm leaning towards a sensitive body if only because it seems well rounded and equipped to learn and discern? Biomechanics is a necessary building block for being any good at combat, so we aren't completely ignoring that need. Infowar is going to be very helpful on a planet full of ancient murder machines in the wake of a nanotechnological apocalypse. Rhythms is just damn cool.
I don't particularly want to neglect anything but, being a hylic, spirit seems like the lowest priority unless we're set on trying to rapidly overcome the social stigma through raw charisma?
[X] A Sensitive Body, attuned to itself and the world around it [+2 to all Appetite Attributes, +1 to all Form Attributes].