Very well spoken. I guess in the end it comes down to whatever blows your deathstar. d6, d20, neither is perfect, it comes down to which works better for you. Although I agree on the heroic underdog aspect. While my players won't go rescuing the smart mouthed princess any time soon (stuck on a low tech planet for the time being), they know what it's like to be the only line of defense for a town that can't defend itself against outriders and biker gangs. They also had a crash course in ambush tactics and how to fight a superior force. Not bad learning for later on against Imps.