I’ll stand for a little bit of milk in coffee to cut the acidity and cool down the insanely hot industrial coffee machine temperatures, but anything else is disgusting to me. I don’t think sweet belongs in coffee. I don’t even like sugar in it. To me, flavored coffee is like putting patchouli on a hippy. They still smell like unwashed funk after you use it and then you have the second smell to deal with.
If you don’t like the flavor of regular coffee, I don’t think adding tons of sugar, chocolate, and god knows what other flavors to it will help. You can’t kill the coffee taste and then you have that second taste competing with it and making an even worse taste mess in your mouth.