1. That depends on the stage of the plot that I'm at and the situation at hand. If I'm at the beginning of the story where the setting and characters are being introduced and no conflict or reason to act in a way that would severely change the plot or setting, then I would be fine with about 2-3 choice-less links in sequence, though I would appreciate choices that change the plot on a minor level, choices that don't change anything but display different information, or choices that don't have immediate consequences or effects, but show up later in the story.
2. Generally I prefer 200-750 on each page. I'd much rather prefer the author splitting up the text between pages via single choice links than a single huge page.
3. Yes, since more length means more time and effort being put into the storygame, and more content in the storygame. However, quality is still of upmost importance and long does not mean good (though this is usually the case, since an author willing to write an above 6 length storygame is generally also willing to write a quality storygame).
4. I’d have to say a storygame style similar in branching style to End’s stories, choices that determine the outcome in a substantially different way than the other choice. A storygame that bends and molds to my preferred choice, and it happens often and doesn’t stagnate when it could easily offer a choice that shakes off the stagnation in a specific situation or plot point. That is a CYOA.
5. I absolutely despise items in storygames. They could easily be substituted and kept track of via variables, such as Berka’s DMA.
6. An undesirable outcome/unsatisfactory ending where the protagonist essentially fails at what they’ve set out to accomplish or they end up with a pitiful existence that they are unhappy in, cutting the storygame short, basically making it a mini-ending. This way, the storygame does not go far down a failing route and it concludes the story better than a simple death can, but it still retains an unsatisfactory feeling that makes me want to go back and try for a better ending.