- It helps me follow the flow of the story more easily. Our lives don't have breaks, it's just one continuous onslaught of events, so it also allows the characters to come alive.
- Once I've refined the story a bit, I can see where peaks and troughs occur in terms of pacing and that helps delineate where chapters start and end.
- Although I've started to introduce a bit more plotting, I'm still a pantser at heart and writing one big block of text allows for various diversions without worrying about how they're going to affect chapter structures.
- The action can be reordered as required to create chapters of roughly equal length, although I don't think this is as hyper-important as ensuring that each chapter works as a self-contained unit.
- I haven't yet gone to the step of publishing a book without chapters, although the majority of Terry Pratchett's books appeared in this way. The advantage of this approach is that it doesn't allow the reader to pause for breath and hopefully they'll keep reading for as long as is practicable.
What's your relationship with chapters like? Do you write in chapters from the start or is it a secondary consideration?