Diet coke tastes like overly strong toothpaste (or just any different toothpaste for the couple days after switching brands before you're used to the taste... if anyone knows what I mean)
Why don't you just drink Coke Zero instead of Diet
ToothpaCoke? It doesn't have sugar/HFCS, it's sweetened (in USA/Canada) with aspartame, acesulfame potassium, potassium benzoate, and potassium citrate. Mmm, listing that out sounds so delicious... anyways, the main thing is aspartame, same as diet coke but formulated to taste like coke and not dog ass.