OMG I was ADDICTED to Diet Coke all through highschool/university like 3-5 cans a day at times. Jitters and anxiety if I didn't have one when I was craving one. Life was terrible lol. About two years ago I made the switch to Club Soda. I figure i'm more addicted to the carbonation (i find it extremely thirst quenching) and every once in a blue moon i'll have a diet coke and I actually don't even like it that much anymore. It takes effort but it's worth it. Ingesting all of that aspartame can't be good for you and it certainly aids in the whole unhealthy eating thing (what goes well with a Diet Coke? why, chips, of course!).
At first Club Soda was kind of gross to me, so I would do half orange juice/have CS and then moved to CS with a squeeze of lemon or lime, and no I just drink it straight up, i love it!