sensibility

angle, attitude, mind-set, outlook, perspective, slant, standpoint, viewpoint

belief, conviction, judgment (or judgement), mind, notion, opinion, persuasion, view

aesthetic

approach, fashion, form, how, manner, method, methodology, recipe, strategy, style, system, tack, tactics, technique, way

emotion, feeling, heart, passion, sentiment

strain

cheer, frame, habit, humor, inclination, mode, spirit

expression, tone, vein

character, identity, individuality, makeup, mettle, personality, selfhood, self-identity, setup

disposition, grain, nature, temper, temperament

discernment, insight, perception, perceptiveness, perceptivity, percipience, sagaciousness, sagacity, sageness, sapience, wisdom

acuity, acuteness, acumen, astuteness, clear-sightedness, keenness, penetration, perspicacity, sensitivity, sharpness, understanding

advertence, advertency, attention, awareness, cognizance, consciousness, ear, eye, heed, knowledge, mindfulness, note, notice, observance, observation

responsiveness, sensitiveness

susceptibility, susceptiveness

appreciation, apprehension, comprehension, grasp

brain(s), braininess, brightness, brilliance, canniness, cleverness, gray matter, intellect, intelligence, judgment (or judgement), mentality, power, reason, sense, smartness, wit

deepness, depth, profoundness, profundity

discrimination, foresight, foresightedness, judiciousness, prudence, sanity

logic, rationality