well you may also consider conscientious, honest, loyal, forthright, dependable, decent, trustworthy, principled, virtuous, high-minded, in summary: an idealist of a rare sort
I value it to a certain point but consciously emphasizing adherence to some rules, be they internal or external, evokes a sense of building cage then trapping yourself within it and proceeding to glorify the bars you have crafted with the fervor of naive idolatry.