Similar to the list of popular pages in WikiProjects, I would like a ranking of the popularity of pages on my watchlist. This is helpful to me as a contributor to know which of the articles I have worked on and am interested in will have the greatest impact if improved further.
This is a new feature request, which should go through the next Community Wishlist Survey in order to be prioritized. The next survey will start in November 2017.
For more info on the survey process, see the 2016 Survey page: