Hi,
When I do have cola type drink, which I don't all that often, I choose Pepsi. Coke sets my teeth on edge, and then makes them feel fuzzy. I don't really go for the diet styles of these drinks, I've generally found they taste worse. Of course I think all these drinks taste different in various parts of the world, I remember having something like Sprite in the US which was horrible compared to the NZ version.
BTW, when I do drink soft drinks I will generally drink ( in no particular order ) lemonade, Fanta, Sparkling Duet, Mountain Dew, Creaming Soda, L&P ( NZ drink ), lemon lime and bitters or root beer/sarsaparilla. Golden Circle Creaming Soda and Bundaberg sarsaparilla are two of my particular favourites.
Mostly I drink Twinings Earl Grey tea, hundreds per day :-).
I should get back to work ;-).
Regards,
Jo