Champagne is often yeasty. That hasn't stopped me from enjoying it.
YeastYeast is a single-cell microorganism converts sugar into alcohol by the process known as fermentation.
This term denotes smells originating from yeasts present on grape skins. Champagnes, for example, are often yeasty. Brettanomeyces yeast generates a characteristic gamey/smokey odor, that can be positive in small quantities, but is negative in excess.