When I was growing up, Pepsi was the only soft drink ever in the house. That's from Dad's side of the family; most of them are "Pepsi or nothing" people. My aunt will ask at a restaurant if they have Coke or Pepsi; if the answer's Coke, she'll just have water. But lately I've been trying to reduce my soft drink consumption (I don't think I'll ever be able to cut it out completely...I like soft drinks too much), and Dad mostly gave up Pepsi when he was diagnosed with CHF and told to limit his liquid intake. Sorry Pepsi!
Also...I said this here before but Dr. Pepper with a splash of Coffeemate's "Dirty Soda" creamer (with coconut and lime) is my summer go-to soft drink. It's delicious!