.how does Dr Pepper taste like?
It's sweet and syrupy, but doesn't have a hard tang to it like Coke or Pepsi. As for the actual flavor...it's not really like anything else that I've ever tasted.
I have never drank Mountain Dew.
Mountain Dew = Partially-Lemon flavored Sprite.
Between Coke and Pepsi, I would have to choose Pepsi. Coca-Cola tastes like metal to me and has a ton of carbonation, which I dislike. Pepsi at least has some other flavor to it other than that which you get from licking a dirty penny.