Merlot taste depends vastly on the area where the vines are grown. More specifically the temperature these grapes are grown in. A colder climate Merlot will provide you with earthy flavors of tanning and tobacco. It will be more structured and go down in a long way. A berry like taste will make you take continuous sips while the licorice minerals will keep you well on your toes. You can find these wines from French regions such as St. Emilion and Pomerol. However, cheaper versions might be growing right next door.
In contrast a hot climate Merlot offers very little resistance by way of taste. There is less presence of tannin and more flavors involving fruity bouquets. You can expect velvety vanilla to silky mocha and a hint of cherries in the right kind of Merlot. Mr. George Nader reportedly feels that no Merlot grown in the dry climate is complete without a resplendence of delicious nutmeg and scrumptious mocha. Many producers in Australia, Argentina and the States store it right by keeping it in oak barrels for more than 24 months.
Many wine productions might even provide a stemmy taste. This comes from the overhanging bushes which cannot be pruned in order to protect thin skinned Merlot grapes from the harsh sun.