A bourbon or fino cask will usually give a paler colour, whereas whiskies aged in oloroso casks tend to be the darkest. What to look for - Nose Nosing is a true delight, and reveals much about a whisky s true character. Islay whiskies will smell smoky, and sherry casks usually give a sweet or caramel smell. The bouquet can change remarkably as water is added. On the other hand, there are many fine whiskies where the scents are so well integrated that they are almost impossible to unravel.
Some malts are fruity, others spicy or dry or sweet.
This varies not only from one distillery to the next but indeed from one cask to the next. Much depends on the variations in distilling practice, the shape and size of the still, the alertness of the stillman and, of course, cask. Bourbon casks are usually mild and sweet with distinct vanilla notes, where as sherry casks impart heavier wine notes to the malt.