@ystokes
The main reason I don't read anything under 100k is the better the story the more disappointed I am with it at the end. I just keep thinking there has to be more.
In my case, I typically end each of my stories with several hints concerning what's next in the characters' lives, assuming the readers can imagine what follows in their own imagination, while also leaving the potential for a sequel, if I suddenly see a new way to take the story at a later date. So, while all of my stories have a definitive end (typically 20some chapters) I prefer leaving them 'open ended', so my readers can continue the story without me.