Do any characters grow or change during the course of the novel? Carl the Santa Claus. Although all stories were focused on horror or some bloody event, I really wasn't expecting the ending of that story. He changed from one extreme to another in a matter of seconds.
What motivates a given character’s actions? Each of these stories brings out the worst in humans while some focused on altered perceptions which is how most of us see the world. We are adamant that the world functions exactly as how we understand it without realising that at least 10 other people are thinking the same thing.
Which characters do you particularly admire or dislike? Lenny. He seemed so flawless and so interesting right up to the end when this perception is altered in every way possible. That is the one thing that is dominant in all stories, they each had an open ending or a weird twist that is worthy of M. Night Shyamalan.