Contented to a fault with oneself or one's actions:
— He had become complacent after years of success.

synonyms: self-complacent, self-satisfied.

Roget 894: courteous, polite, civil, mannerly, urbane; well-behaved, well-mannered, well-bred, well-brought up; good-mannered, polished, civilized, cultivated; refined etc. (taste) 850; gentlemanlike etc. (fashion) 852^†; gallant; on one's good behavior.    fine spoken, fair spoken, soft-spoken; honey-mouthed, honey-tongued; oily, bland; obliging, conciliatory, complaisant, complacent; obsequious etc. 886.    ingratiating, winning; gentle, mild; good-humored, cordial, gracious, affable, familiar; neighborly.    diplomatic, tactful, politic; artful etc. 702.    ... show more

Roget 906: benevolent; kind, kindly; well-meaning; amiable; obliging, accommodating, indulgent, gracious, complacent, good-humored.    warm-hearted, kind-hearted, tender-hearted, large-hearted, broad-hearted; merciful etc. 914; charitable, beneficent, humane, benignant; bounteous, bountiful.    good-natured, well-natured; spleenless^†; sympathizing, sympathetic; complaisant etc. (courteous) 894; well-meant, well-intentioned.    fatherly, motherly, brotherly, sisterly; paternal, maternal, fraternal; sororal^†; friendly etc. 888.    ... show more