I'm not a fan for the most part. It's not about fear of or disinterest in the future or the unknown; it's a matter of the way the stories are told. I find them dull much of the time. They actually feel very literal & often shallow, often focusing on plot & novelty than character development or communicating ideas.
The exception is that I sometimes like dystopia stories (ie. Brave New World) because of the ideas & comments on the current realities that they convey. There is that "warning" element to it, which is interesting; however, even that is becoming a cliche angle.