Chuck-
I love HARP - it is very adaptable - and most EVERYONE (it seems) brews up their own version with house rules, selection of combat rules, etc.
Yup! (As an example)
I am in the process of replacing the Profession system (for the last 6 months or so, on/off) to allow for more personalization/customization.
Instead of making a 'Fighter' and picking some weapons, talents and saying 'The theme is 'this'...
You choose a Realm, then a base Profession, then a Focus. Each gives skill areas,talents, etc...overall, the power level is on par with the Core, but with more versatility, especially given the Perk system that I have dredged up from my old Homebrew (Where each character gets contacts, gear and favors based on who/what they are).
My friend David's character, for example.
Realm:...Of Arms
Profession: Gunner
Focus: Pistoleer
Sorry, OT.
Anyways, Harp is a damned fun game, to be sure.
-Uriel