I have nothing against High Fructose Corn Syrup, per say. I drink plenty of Pepsi and Mountain Dew - and plenty of other sodas.
I just *strongly* prefer the taste of real cane sugar in my soda. When 7Up started advertising that they reformulated 7Up to be "100% Natural", I was overly excited, since HFCS is about the most unnatural thing ever. When I found out that they kept using HFCS, I was very disappointed (apparently, I wasn't the only one, as there was a lawsuit and 7Up changed the advertising to "100% Natural Flavors"). I feel their advertising is still deceptive and the same with Coca-Cola's Sprite advertising... thus, I just won't buy either until they change their evil ways.