I've really tried to keep the maintenance categories to a minimum, not that you can tell that from looking at the page (the categorization project got carried away). I have the feeling that if you create one, someone comes along and fills it up.
And they pretty generally fit into one of the two categories mentioned. If they're just a couple of merged gedcoms, they need gedcom cleanup. When I find one in the "long Profiles" category, I do a happy dance, because in comparison to some of the others in the category, they are easy.