No matter how many times I give a thumbs down to every single story in specific categories like parenting, home & garden, sports, and food, I still get served these stories. Over and over and over. Same goes for stories I give a thumbs up to — I don't see any more stories of the same type, just the same exact makeup every single day for months.
The thumbs up/down system is either a placebo or preferences are simply not weighted enough. At least allow me in the preferences for the homepage to select which categories to enable or disable, arrange them in a preference hierarchy, something. This should be a cool feature but right now it's just a chore.