Dark Hufflepuffs
No, seriously...
Hufflepuffs are known, essentially, to be something of a "pure" house. They're the ones who have the least amount of dark wizards, and overall, they're basically the nice loyal (albeit portrayed as boring) house.
And yeah, people have been giving Hufflepuff house depth. However, most of the depth is to make it more interesting and expand on all the good things, but very little of it seems to be focusing on the dark side. Gryffindor has dark wizards. Ravenclaw has quite a bit of morally grey peeps. Slytherin... yeah. But Hufflepuff? The worst you get is Zacharius Smith, who honestly just seems to be a really grumpy and cynical character more than someone actually "evil".
And no, I don't mean to bring hate onto Hufflepuffs. Hufflepuffs are great! Loyalty and hard-working are excellent traits to have that should be focused on more often. Hufflepuffs in no way are a leftover house; they're just a hugely underestimated house. I'm a Hufflepuff (I think), and I love it.
However, to not afford it to the same degree as the other houses makes them seem less of a house for actual human beings and more of this pure, angelic idea. Loyalty, honestly, and hardworking should be able to be turned into flaws and villainous traits like Slytherin's ambition and cunning are (Ambition is a good thing, and I will stand on that hill until I die).
We could have a Hufflepuff blood purist/death eater, who's extremely loyal to the cause and to the other death eaters (for their own reasons) and who works hard at helping the others and defeating the Order and who's blinding honestly leads to bluntness and hurt feelings. We could have a Hufflepuff ministry worker, who's loyal to the ministry no matter what state of corruption it's in, and works to support and help it no matter what (even if it conflicts with basic moral values). We could have Hufflepuffs using their connections they build to learn secrets and pass it off to Voldemort and no one would know. We could have kind, sincere Hufflepuff teachers at hogwarts who turned out to be fighting for Voldemort. We could have Hufflepuffs who really think they're doing the right thing when they're obviously not (and man, those types of villains are terrifying). Why can't it happen to the other houses and not Hufflepuff?
It's like the inverse of Slytherins being bad. Not all Slytherins are bad, so why are all Hufflepuffs (or most; by all basically all that we have seen in canon) good? Everyone exists on a moral spectrum of grey, and it should be the same for all houses, irregardless.
(And that's where sortinghatchats succeeded when JK failed. Sortinghatchats isn't about good/evil, it's about why you do what you do and how you do it. A vilain and a hero can exist with the same morality, just twisted in different ways.)
Honestly, the concept of the Sorting Hat is honestly really old. You're telling me that a talking hat can determine/figure out who an 11 year old is going to be? At that age most kids are just excitable little monsters who are hyper 24/7 (if you don't know what I'm talking about then you are blessed). Most people don't figure out who they are until they're an adult (assuming they know at all), and you're telling me that a hat can do it to kids? Please. If there should be houses at all, it should have to do with fields of interest, perhaps, or maybe random or something, anything else.
(JKR, for this reason and many many many (much more important) more, fuck you.)
