They are kind of sweet, as mentioned above. I think of them as usually being sliced in thin rounds and put in sandwiches and burgers. I associate them with the middle of the country, even though you can find them everywhere.
I grew up on sour, half sour, and dill pickles, so butter pickles are not what I expect from a pickle at all.
Plus, I like pickles on the side not inside of a sandwich. I pick the pickles off of a McDonald’s hamburger.