I have been thinking about how this characteristic defines the physicality of characters in the game. Disclaimer: I know that this is meant to be an abstract, narrative game.
But I have been thinking that there is not enough difference in stats between the muscular strength and mass of a Wookiee v. a Human vs. Chadra Fan for my taste. I feel like they made 2 the average stat for humans because the whole Characteristic system is set up to reflect and be relative to Human capability.
I also feel like Star Wars tends to deal with humans on a homogenous physiology of being either adults or children, not other big variations. I think this is because there are aliens to portray those big guy and little guy tropes. In a setting with so much physical variety, the average human standard is a psychological anchor point for perception. I don't really go in for genetic alteration or other weird sci-fi stuff for humans in Star Wars, so I tend to be dealing in the same trope: average adult humans.
I wish that the species had been given some abilities to compensate for the difference in obvious muscular capability. I came up with some Abilities as house rules:
Hulking: The Species/Droid possesses larger size and/or muscle density. In contests involving the Brawn Characteristic, opponents who face the character suffer an automatic inclusion of a Challenge die to the check. When the character attempts a test of strength (Athletics) the difficulty of the check is downgraded by 1 (to a minimum of Easy, 1 Difficulty die).
Light Frame: The Species/Droid has a smaller frame and lighter musculature in relation to humans and human-like species. This means that in tests of strength (Athletics) the character suffers an automatic upgrade of the difficulty of the check for their small size.
I also feel I like having Human Brawn and Wookiee(Trandoshan, Herglic, Besalisk, etc.) Brawn be the same for the purposes of combat and checks, but different in descriptive comparison. I don't think that a human is ever gong to really get to the same level of strength as a 7.5 ft. tall arboreal simian that climbs 1000 ft. trees. A strong man competition guy with a very overwrought musculature and strength is still not as strong as a Gorilla from what I have read. Even a guy like this is just getting there in the realm of some of these aliens as far as pure strength... https://en.wikipedia.org/wiki/Hafþór_Júlíus_Björnsson . So if a player really wants a man-mountain type character I would think that's doable, but he is going to be kind of a one-trick pony because of the dedication it takes to be that big and to have actual useful strength from strength training and not just from body building. Even still, given a wookiee of the same dedication and drive, the wook will be way stronger.
What do you guys think about this stat if anything? I imagine most will jut say that they don't, and that's cool, but for those who are more sim-minded how do you like to consider Brawn? Or Agility for that matter?