Besides sugar sprinkles, I also regularly check my supply of food flavoring and food colors. Well, not really but I should, I noticed I'm almost out of my favorite flavoring, lemon.
Making a basic cookie dough and changing the flavoring is a quick way to develop different-tasting cookies.
Once you have the dough almost made, divide the dough and add different flavorings to easily make different cookies. For the basic cookie use pure vanilla. It does make a difference in the final cookie flavor.
You can also add food coloring to cookie dough to easily make different-colored sugar cookies. When I separate the cookie dough and add different flavors, I tend to add food coloring to easily know which cookies are what flavors.