I would have a hard time answer a soda poll. There are far too many to choose from and it often depends on the mood. If i dont want anything with a crazy taste ill stick with the regular pepsi or cok(dont care). But then if I feel like something a bit out of the ordinary ill go for a Mountain Dew or even better...Orange Fanta. So I guess my answer would be the holy trinity of soda..pepsi, mountain dew, and orange fanta.
Side note-I am going to stop drinking soda again..its not good for me. Last time I did this I went a full 3 months without it. Not bad really. Its not so much the problem of drinking it at home since I have water, orange juice, milk, and beer here to drink, its the issue of going out to eat. At restruraunts soda is cheap and has free refills while orange juice and milk cost an arm and a leg. I dont like drinking water at a meal.