Sweeteners, they are bad for your health though, that's all I can really think of though.
I drink black coffee, sometimes with a pinch of cinnamon.
But gabbikati, black coffee tastes like s*** with a sweetener :|
i wouldn't exactly call it low calorie but i use coffee creamer. international delight has a lot of good flavours. 35 per tablespoon vs sugar and cream which can if you use a serving of each your adding 90+ (likely more calories if you like it sweet/creamier) calories. :) I also like starbucks coffee which you can get a coffee 200 calories or under that tastes amazing! (iced caramel macchiato, iced cinnamon dolce, vanilla lattes, lattes, mochas etc) :) or you could try using coffee syrups. most of them i don't think you need to add much milk to, and most of them won't require sugar.
lite soy milk...cinnamon's also good.
Is cinnamon by itself good?
I just add splenda, despite it being poison.