The great thing about this question is that it puts them at ease, and lets them answer without feeling like there is a right and wrong answer. But, the answer to this shows me to what extent they are passionate about food and wine. If their answer is "Cabernet", without much explanation, it suggests that they do not spend much time learning about wine and expanding their knowledge. But, if they say "I'm a fan of Thai food, so a German Riesling, especially from Mosel or Nahe, are personal favorites" I gather that their passion for food and wine doesn't stop when they leave work.