One collary I'd add to this is that the opposite is also true. There have been plenty of times that I've trudged through the beginning of a novel, only to reach an "anti-volta" and realize that it isn't for me. It can incredibly frustrating and make the slog feel like a huge waste of time, but I still keep trying books. Maybe I'm just chasing the highs I felt when I first read the novels that got me into reading.