With the story that I am currently writing, I am hoping that readers will want to explore as many of the different story paths as possible. It's being structured in what this site calls the "Time Cave" format, and so far there will be at least 29 unique endings.
Some of the original CYOA books seem to have been written with the assumption that readers would read through multiple story paths; rather than writing one "main" story line that includes all the details and answers all the questions, these tidbits were spread out through multiple story paths with unsatisfactory endings. Those unsatisfactory endings--where you die, or fail to solve the mystery, or get side-tracked by a minor B-story--motivated the reader to backtrack and try again. If done well, the reader could see the connections between the various plotlines and piece together the overarching narrative.
But if the mystery was fully explained in multiple "successful" endings, then the reader gets what s/he wants in the first or second try, and the book gets quietly put back on the shelf.
Some of the comments on my first story on this site, Marooned on Giri Minor, suggested that there could have been more development of the secondary characters. Yes, I agree I could have sprinkled in more details here and there, but at the same time I think those highlights need to be inserted into places where they are organic to the story, and not just written as exposition for exposition's sake.
For instance, the first choice in Giri Minor asks if you want to hang out on the bridge or go on a spacewalk. If you choose the first option, you get to hang out with Captain Siggo and interact with him, but if you go on the spacewalk you get to interact with Tira Indrian. Later in the story, if you pick the right path, you will find a good character moment where you learn about both Dionysya Andrade and "you" in a single passage of dialog. As in real life, if you choose not to interact with those characters, then you don't learn much about them; and because this is a "Time Cave" story no one plot line answers all questions.
The follow-up story to Giri Minor, with its 29-and-counting unique endings, will take this element up a notch. That story will be far more enjoyable if readers take the time to explore as many of the branching plotlines as possible--not necessarily all 29, but at least each of the four main branches. Going straight to the "win" ending will result in a very thin story, and therefore garner poor ratings and reviews. On the other hand, I worry that if the reader gets mired in one unsatisfactory ending after another--and don't worry, I am trying not to rely on cheap deaths as a way to inflate the ending count--they will just get frustrated and quit reading the story altogether.
So as the writer, I am being mindful of my obligation to create an intriguing world and populate it with compelling characters. For the readers, I will probably insert a disclaimer at the beginning reminding everyone that "Time Cave" stories were designed to be read multiple times. Don't base your rating or your comment on the very first read-through.