RPG based on KOTOR – suggestions and perceptions!

So, which stats? Strength (STR), Dexterity (DEX), Constitution (CON)...

Wizard! Have you even played? There's Strength, Dexterity, Endurance, Intelligence, Wisdom, and Charisma. Building droids or something like that will just be a new skill, similar to wielding a two-handed weapon.