A combination of many spices, which typically includes turmeric and cumin, curry is often described as intense or harsh. The reason for this is the way your tastes buds individually process each ingredient of this complex dish. But, leftover curry offers a much mellower flavor that's sometimes described as sweet. This is because, as it sits in your refrigerator -- in an airtight container for no more than four days -- the many different flavors and spices unite to offer a smoother, yet complex, marriage of flavors. As your curry is reheated, the aromatic ingredients like peppers and onions continue to break down and release flavors and aromas not present when the dish was first served.