Speaking only for myself, I drank Coke for years because, well, of course I did, Pepsi is the "inferior" drink.
But at some point, I realized that every time a restaurant told me they only had Pepsi, instead of being annoyed, I was actually happy. Only then did I realize that I actually prefer Pepsi, and have been drinking Pepsi ever since. (I have quite a sweet tooth, so the fact that Pepsi is much sweeter means it tastes much better.)
I literally had to learn this about myself by observing my gut reaction to being told a restaurant only had Pepsi, because Coke being obviously better was so ingrained in me.
But at some point, I realized that every time a restaurant told me they only had Pepsi, instead of being annoyed, I was actually happy. Only then did I realize that I actually prefer Pepsi, and have been drinking Pepsi ever since. (I have quite a sweet tooth, so the fact that Pepsi is much sweeter means it tastes much better.)
I literally had to learn this about myself by observing my gut reaction to being told a restaurant only had Pepsi, because Coke being obviously better was so ingrained in me.