Getting the maximum enjoyment and tasting experience out of the wines you've spent your money on may require patience. Optimizing your pleasure from them often means waiting to drink them until they've developed their full potential. However, a lot of wine on the market is as good as it's ever going to get. Those, plus jug, box and highly advertised wines will show little if any improvement from cellaring them. Of course, to determine if your wine is ready to drink, you should have a quantity of it so you can taste a bottle every so often.
Red wines are usually the least ready to drink when they appear on retailers shelves.
And, of those wines the Cabernet Sauvignon grape varietal is almost always the least ready to drink when you take it home, due to its high tannin levels. The tannins soften and many times develop a sweetness while the aromas and taste will take on complexity and character. The world's best wines with the longest cellaring potential are predominantly made with Cabernet Sauvignon, the noble grape. Even some California Zinfandels improve with a couple years of cellaring. We'd all like to drink the best, aged wine.