Sentence:  This research seemed to suggest that the product's <WSD>acquired taste</WSD> which they had been fuelling could also be a latent disadvantage. The advertising campaign implied that Guinness was an <WSD>acquired taste</WSD> for the discerning drinker; ... 
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.