I stopped drinking Diet Coke in January.
I still have one once in a while, if I'm out somewhere and there are no other options, etc.... but I don't keep them stocked in my fridge, and I don't make special stops for fountain Diet Cokes anymore :)
The whole foods store near my office carries all kinds of things, and recently I stumbled upon these beauts...
It does contain caffeine, but there are no artificial sweeteners, no calories, and seems to be a fantastic alternative for those days when I just want a pop!
It's nice to have an option - if I really want one.