Well, all of those flavored lattes are done with sugary syrup. You can still flavor your coffee without sugar. Things like raw cocoa powder, cinnamon, nutmeg, ginger, etc. (maybe vanilla extract too, but I'm not sure how much sugar that might have on its own)

Cardamom in coffee is quite tasty. It gives some of the flavor of Turkish coffee without all the viscosity.

>dessert-in-disguise.

Double espresso with a dash of Baileys.. mmm..

off-topic, but it's almost December.

I just came across a recipe for freezing coffee in ice cube trays, and then putting it in with Baileys and vanilla vodka.

This sounds like a winner for the annual "It's a Wonderful Life" every time they say George Bailey drinking game.