I say 'soda' now, but when I moved to Washington from Montana I got made fun of because I then called it 'pop'. So I can call it either depending on who I am talking to. My daughter always calls it soda.
I grew up in Southern NJ saying soda. Moved west to Arizona and it became pop. Moved to PA and they seem to say Coke. My husband raised in the midwest/Iowa just gives a general term, "You want a cold drink". Since living in NC for nearly 20 years it's, I need a DR. Pepper!!"
Want to do a taste test?
Find your favorite drink in all the ways it can be served= canned, fountain, bottled--plastic &/or glass
You don't know the real taste of a Coke or Dr. Pepper unless you get it out of a glass bottle!!!