Heh. Well, being a really good friend sucks. When you're the dependable one, everyone "forgets" to invite you to the fun stuff. Then they get in fights with their fun friends and come bitch to you about it. Then they make up with their fun friends and boom, they're off again while you sit around wondering why no one appreciates your loyalty.
No one doubts that the other houses can be loyal (even Slytherin is loyal to their own), but they have other skills too. I get the feeling that Hufflepuff is damning with faint praise -- "oh, Hufflepuffers are really nice. And they're loyal." Because they have nothing better to do -- they don't have the brains or panache.
I don't want to be known for being loyal when I could be cool in my own right instead, like Gryffindor and Ravenclaw and yes, even Slytherin. I'm tired of being "the good friend."