I suppose that would be true - like every personality is different, everyone's soul has a different potential for "good" - or at least, some have more developed "good" qualities than others. But it's all situational too... like I would be a lot more patient and thusly "good" if I didn't get my buttons pushed everyday by certain people :) heh
I wish everyone could just be good!! But then, I suppose, we'd never learn anything. And that seems to be a main purpose of life, in my opinion.