I had to give up my beloved Pepsi's. Switched to diet Pepsi and found that a way to make taste like old fashioned soda fountain sodas. Pour Pepsi (or Coke) in a tall glass with plenty of ice and just a couple of drops of Hershey's chocolate. Stir and sip with a straw. Delicious!
The only bad thing is that most soft drinks contain Aspertame which gives me headaches, so I don't drink too much. A better choice is RC Diet Cola sweetened with Splenda (hard to find, though), or Diet-Rite Cola also sweetened with Splenda, not quite as good as the RC, but found in most supermarkets.