Several people I know who grew up drinking pop will say they "hate water". Drinking water for them is boring or like a chore. The local water here is even highly ranked among the US as a whole for good taste, so it's not that our water is actually bad. I do recall feeling similarly in the past. At some point I got a nice metal water bottle and started carrying it around and drinking water, and I grew to enjoy it. Time away from pop and energy drinks for a while also made it more obvious how gross my mouth feels after drinking some. My tongue feels coated and sticky for hours, my teeth sometimes seem to feel weak. I imagine in the past this was something like my normal state. I didn't know what I was missing. It's hard to convince people to change on this. They'll get an attitude like you're some health freak trying to hook them on a diet. Even my parents have a favorite pop each and will drink 2-3 a day. Caffeine probably plays a large part as well. Most of the people I have in mind don't like or consume tea or coffee at all, because they don't taste very good (especially when you're used to pop).