Any carbohydrate consumed in a sufficient quantities can increase insulin levels and lead contribute to fat gain. Additionally, any fat or protein consumed in sufficient quantities will contribute to an increase in body fat. All nutrients can be good or bad depending on how they are consumed.
I havent really read this thread.
I dont know if im the only one, but when I went through a phase of drinking 2 litres of coke zero a day (best caffeine hit as its basicly caffeine with no calories to fill you up) I would break out in mouth ulcers.
These days my fridge is stocked with soda water, orange juice and vegetable juice, if I want something fizzy I will drink soda water, if I want something sweet I will drink orange juice.