I can say that I don't like the taste of diet sodas, except for Fresca.
Agreed. I have always hated the taste of diet soda. Sweeteners give me a headache, not to mention an awful taste in my mouth. I have never been able to understand the people who say that they really cannot taste much (if any) of a difference between regular and diet soda.
I wish they made san pellegrino in diet. Much better than fresca imho.