The 10 most popular spices include black pepper, cinnamon, cumin, garlic, ginger, nutmeg, oregano, paprika, rosemary, and turmeric. These spices are widely used in different cuisines and add unique flavors and colors to the dishes. Black pepper and cinnamon are commonly used in sweet and savory dishes, cumin is a staple in Indian and Mexican cuisine, garlic and ginger are used in almost every cuisine, nutmeg is commonly used in sweet dishes, oregano is a key ingredient in Italian cuisine, paprika is a popular spice in Hungarian cuisine, rosemary is used in Mediterranean dishes, and turmeric is commonly used in Indian and Middle Eastern cuisine.