dragoner
KosmicRPG.com
I crunched a lot of numbers for my Solis People of the Sun for Cepheus Engine, though most of it was me taking stellar data, and turning it into a playable universe, a lot of that was not inherent in the rules, I used datasets from simbad, with AstroSynthesis and such. That sort of front loaded number crunching I don't mind as much, some of it, like making the star maps was even therapeutic in a way. However, in play, I am less interested in number crunching, as the returns vs inputs is less. More time putting numbers in, makes everything go slower, which interrupts the flow.