Usually I prefer my superheroics to take place in a recognisable world, and see all actual worldbuilding as needless extra effort. See These Bones wouldn't work without the post-apocalyptic worldbuilding, however, and it's all the better for having it. Likeable yet very flawed characters, bad thingss happening to good people consistently but still somehow not unfairly, and superpowered action that feels crunchy and dangerous. Very much my kind of book.