I've mentioned user-generated lists before, but since I'm reading through I thought I'd bring it up again.
The trouble I have is that I can easily add or remove chapters from a list, such as this one. The trouble arises if I want to read all the chapters in a list. So taking that list as an example, I go through one by one, reading the chapter, then going back to the list page, choosing the list I'm reading, then finding the story I just finished, then selecting the next in the list. That's a lot of pointless steps. It gets worse when I get to stories like Sweet Tears, which then requires that I scroll after going to the list page each time. That of course makes it trickier to find a particular item, and so on.
It seems like all those interim steps could be automated somehow, since they're literally the same every time you finish a chapter. Perhaps set up a pulldown, same as with chapters or volumes, so you can choose whether "Next Chapter" takes you to the next story in a volume or the next in your list.
All I know for sure is that the back to list page-choose list-find title-what was the title again-back page to check-choose next title routine gets old very fast.