We really do want something very lightweight. GURPS has too much detail for casual users unless we draft our own Ultralite version. A lot of what we do is defined by our training, role, and access by virtue of our rank and specializations as officers of the competent and ethical TSN.
We are looking for a way to represent a few things of colour outside that, not forgetting that we don’t want anything that will intrude too much on the actual shifts.
So hobbies, contacts, cultural background, maybe research specialties.
Already most characters are defined by their primary, secondary, rank, species, homeworld, family affiliations, career prior to joining up.