I think, that of all the houses at Hogwarts, the Hufflepuffs are the friendliest. Well, to each other at least. We are always willing to help a fellow housemate in anyway we can, and usually we can do anything we set our minds to because, after all, we are the hardest working group.
It's not that we hate the other houses, because we don't. We just know they take for granted what they have.
For example, the Ravenclaws don't give a second thought to how easily they can figure out any puzzle or question. And when on the rare occasion they do have to think about something longer than a second, they complain it's too hard. "If we can't get it, it's impossible," I overheard a Ravenclaw say once. They never think to rise to the challenge, only that when it comes to matters of brain power, it should always be easy for them.
And then there's Slytherin. Hufflepuffs are not actually known for hating Slytherins, because we don't. Sure, they can be a bit evil, but we have always had an okay relationship with them. Especially the pure-bloods in our house. But it's so difficult to really be their friend. Everyone of them has been born into an amazing family. Rich, powerful, feared. They don't have to worry about doing well in school, or not getting into trouble because they will always have their family status. Daddy's trust fund will always take care of them whether they work or not, and if, on the off chance, they did feel like working, no one has better connections than a Slytherin. But, at least they don't pretend it doesn't come easy to them, like the Ravenclaws do. A Slytherin will always let you know that he is better than you, and that everyone is aware of that fact.
But probably worst off all, is the Gryffindors. Again, we pretend to be friends with them, we pretend to be friends with everyone, but in actuality, there is no one we dislike more than a Gryffindor. They have taken everything from everyone. They, instead of Ravenclaw, have the smartest student, and Percy Weasley was probably the most ambitious student from Hogwarts and in Gryffindor rather than Slytherin. We couldn't even have the only Hogwarts Tri-Wizard Champion. Harry Potter had to get his nose into that as well. It always has to be about Gryffindor. It's no secret they are everyone's favorites, well, except for Snape, I suppose. Dumbledore, McGonagall, Hagrid, even our own head of house just loves the Gryffidors. So brave and loyal and caring. Blah, blah, blah.
What about us? What about the Hufflepuffs? No one works harder. No one tries harder. We give everything we have to this school and no one appreciates it. People see us as "the other house." Completely dispensable and of no real value. Last week I heard a Gryffindor say that the only reason there is a Hufflepuff house, is to take all the magical rejects who have nothing special about them.
Well we do have something special about us. Something better than Ravenclaw, or Slytherin, and even Gryffindor. We have the knowledge and first hand experience of what it's like to not have everything handed to us. We know that we don't have to get ahead by putting others down. And we believe, because we have seen, that anything is possible if you put your mind to it and work hard.
So you can see why we only really befriend eachother.
It is because we, the Hufflepuffs, are the only ones of any true worth.
AN: Next is Ravenclaw...