Dr.Pepper; absolutely nasty in my opinion. Can't stand the taste.
Coca-Cola; Sounds odd, but it's too strong for me :s I prefer Pepsi
Sprite; I haven't had it in a while, but I don't mind it. Would prefer 7UP or Lilt.
All-in-all, I would probably have to pick Sprite, but I'd still exchange it for another Lemonade drink.