You might belong in Hufflepuff,
Where they are just and loyal.
Those patient Hufflepuffs are true
And unafraid of toil.

The Sorting Hat describes Hufflepuffs as loyal--which is only a negative trait if you're blindingly loyal to folks who mislead you--and "unafraid of toil." They're hard workers, and brave in the face of strife as we see during the Battle of Hogwarts (second to Gryffindor, Hufflepuff had the most House members who stayed behind to fight).

Hufflepuffs accept everyone ("Good Hufflepuff, she took the rest and taught them all she knew"), don't brag about their accomplishments, and have a lot of integrity. Remember what Cedric Diggory did after he caught the Snitch in the Prisoner of Azkaban when Dementors showed up on the field and went after Harry? He asked for a rematch--I bet you wouldn't see another House Seeker doing that.

Hufflepuffs aren't flashy. They genuinely care about others, and they don't care if you think they're boring or unexceptional. And maybe they get walked over sometimes, maybe they get hurt easily because people take advantage of them, but I don't think that ever breaks their spirit or resolve. I imagine that Hufflepuffs are the most passionate and hopeful, and even in the worst of times, they can power through.

I like that idea.