cheer, feather, humor, mode, mood, spirit, temper

angle, attitude, mind-set, outlook, perspective, slant, standpoint, viewpointemotion, feeling, heart, passion, sentimentstrainbelief, conviction, judgment(or judgement), mind, opinionexpression, tone, veincharacter, disposition, identity, individuality, makeup, mettle, personality, selfhood, self-identity, temper, temperamentresponsiveness, sensibility, sensitiveness, sensitivity