The absolute best diet soda I ever had was Canfield's Diet Chocolate Fudge Soda
. It tasted just like the chocolate sodas I used to get at the soda fountain back when I was a kid. (Minus the ice cream, of course. *g*)
I haven't been able to find Canfield's in years, though. Pity. It was never on sale, of course, but it was worth paying full price for.
We don't seem to have much variety in diet sodas out here in Denver, for some reason. But the ones I like the best are: Diet Coke with Splenda, Diet Dr. Pepper, and Diet Cherry-Vanilla Dr. Pepper. We don't seem to have any fruit flavors except for the ubiquitous lemon-lime, and of course Fresca.
OOoo wait, I forgot -- RC recently started putting out some fruit flavors -- white grape, orange, and one other that I've forgotten. They are pretty tasty, too. But they go down so smooth that I find myself drinking twice as many as a diet cola. So, I pretty much stick to colas.
I don't mind the Nutrasweet taste, and I've never noticed the side-effects that other people complain about (i.e. headaches, etc). But I do prefer Splenda to Nutrasweet, when I have a choice. (Though by this time I've drunk so much Nutrasweet over the years that when all the really
nasty long-term side-effects start showing up, no doubt I'll be the textbook case. *g*)