When cool weather rolls around, I tend to crave flavored coffees.
I like adding spices (such as pumpkin pie spice, cinnamon, or nutmeg), cocoa powder, and natural vanilla and/or almond extracts to create my own little flavors right in my kitchen without having to use caloric or artificial chemical-laden coffee syrups.
The trick is to add your flavorings to the grounds BEFORE brewing so that they brew with the grounds.
Some mixtures I've tried (for 8 cups coffee):
Chocolate Almond: 2 tsp Cocoa powder, a few drops of vanilla and almond extracts
Cinnamon Praline: A few drops of vanilla and almond extracts, 2 tsp cinnamon
Coconut Almond: 2 tsp cocoa powder, few drops coconut extract
Have fun experimenting!