Taste of the major 4?

[wondersofwine]

We could give you generalizations such as Merlot is sometimes said to be plummy, Cabernet Sauvignon may exhibit flavors of cassis or black currants, lead pencil, leather or tobacco, Syrah has a spicy component that may remind of black pepper, etc. but really you need to do your own reading and research. Start with some good books on wine such as Andrea Immer's Great Wines Made Simple or The Wine Bible or Wine for Dummies or Hugh Johnson Encyclopedia of Wine. These should be available in a library or bookstore. It sounds like you need more extensive knowledge than we could readily impart.