You can use any type of cheese in these, but a good sharp Cheddar will produce the best results. I use black sesame seeds as I like the visual interest they add. Just use normal sesame seeds if you cannot locate (or don't want to use) black ones. If you cannot find smoked paprika, use a combination of normal paprika and cayenne pepper. You can also increase the amount of hot smoked paprika if you want a spicier biscuit.