self-exacting, laborious, and inexhaustible
selfishness, coarseness, and mendacity [mendacity = untruthfulness]
sense, grace, and good-will
sensibility, harmony, and energy
sensitive, ardent, and conscientious
serene, ineffable, and flawless [ineffable = indescribable]
serious, calm, and searching
settled, adjusted, and balanced
shallow, false, and petty
shapes, forms, and artifices