One thing that’s great about short stories is how quickly they can ruin your life. Maybe you start reading one over your lunch break and, if it’s the right one, before that peanut butter cup you brought for dessert even has a chance to finish its melting shape-shift into some kind of sugary cement, the whole world has been destroyed around you and then rebuilt, and nothing is quite the same again.
This happens whether you like it or not. Great stories practice this violent beauty on you in a variety of ways: some by making an absurd world familiar (or vice versa), some with a slow burn, some with a voice that colonizes your thoughts. Some do it quietly, almost without you even noticing, and some do it with high wire acts of imagination or intellect that make you into a breathless witness.
The trick, then, is finding the right story, one that is capable of such a thing. This is no easy task. Tastes differ, of course, and it can be confusing to spot the small boat of a great story on the wide sea of fiction. What any reader can offer you in terms of guidance is actually the same thing that any good writer can offer you with the story itself: a way of saying, This is what moved me and made me feel strange and alive in some way; here, why don’t you give it a try?