Man, I seriously wish Dr. Pepper (and a few others) wouldn't keep making all the neat looking flavors Diet. I absolutely can't stand sugar substitutes; the aftertaste hangs in my mouth literally for hours sometimes, and I feel a little sick even with one swallow (or even mouthful, such as when I tried a mouthwash with aspartame in it).
I guess they just figure Americans are all worried about their weight. But come on, the HFCS and the cancer-causing sugar substitutes are probably way more harmful than a little sugar energy you can burn off. Ugh.