Another sensation you will notice almost immediately is the tartness or acidity of the wine. Acid may sound harsh but it is very important in making wine taste crisp and fresh. Wine that tastes crisp has high levels of acidity however if there is too much acid, the wine will taste bitter and unpleasantly sharp. If there is not enough acid, the wine will taste flabby and flat, like day-old beer in a glass. Acidity preserves the wine as it ages.