There is an admin option for what kind of category page to have: categories only, categories and top, categories and latest etc.
There is a profile option for what home page you want: latest, top, categories, new, etc.
Would it be possible to let users choose which kind of category page they want? Either to have it as a separate choice for the home page option, or as a distinct option. So someone could choose to only show categories on the front page, and someone else could choose categories and new posts.