i've heard that there is a chemical in diet coke that contributes to short term memory lose. i dont know if the same is true for diet pepsi. i drink water and coffee.
What - nobody mentions Diet Rite? Diet Rite is the first diet cola that is sweetened with Splenda. It is the only diet soda that tastes good... and the only one that tastes like real cola.
The only diet soda I can stand is diet Dr. Pepper.
It really does taste like the real thing. Although anything with aspartame tends to give me migraines. (Very common side effect)