I grew up in California and I always called it soda... then I went to school in Oregon, where I just finished and everyone looked at me weird when I called it that, since they call it Pop, so I usually take into account my audience. If I am with the fam. I call it soda. If I am with friends from school I call it pop. Funny story about regional terms..
One days when I was working at camp I ran down the the head counselors house to see what was going to be given out for snack that day. I ran up and told my girls excitedly that Otter Pops were for snack. Well I had never gotten weirder looks from people in my life! I thought everyone knew what an otterpop was!! Turns out it is only those of us on the West Coast. FYI Here in Ca and OR Costco and many other stores sell frozen juice pops. You know the ones in the plastic that are just about all flavored, colored, sugar, water? Anyway here the main brand is called otter pops and every plastic tube of juice has an otter on it for each flavor i.e. Ganzo Grape.... things like that. Anyway so every one I ever new just called all frozen juice pops otter pops. Well to make a long story just a little bit longer, aparetly everyone else if the world just calls them juice pops or iceys... Go Figure!