It is better to buy small amounts fresh than a large amount you seldom use. Nuts can also turn rancid and actually do age. Buy what you need when you need it. Powdered sugar makes a smooth cake that dries out quickly. It is best used in special cookie recipes and in icings.
Brown sugar makes a moist cake that keeps well.
Granulated sugars have no variations any longer. Fine granulation is required for cakes. Honey , crystallized, used to be used for sugar in colonial days. Honey has special recipes that can use it in its natural form. It is very sweet.