Sentence:  NBA Hall of Famer Arnold "Red" Auerbach was an <WSD>acquired taste</WSD> for most people who had to deal with him on a regular basis. . . his rough edges becoming part and parcel of his storied success. 
Meaning of the word marked with <WSD> tags:  Something that is appreciated only after having initially been regarded as unappealing or unpleasant; a person who is regarded as difficult or dislikable but of whom at least some have grown to approve.