I never bothered with any of those quizzes. Mostly because I feel like they're skewed towards Ravenclaw, Hufflepuff, and Slytherin. They ask questions that lend themselves to easy answers for those specific houses, but I've always thought they got Gryffindor wrong. It seems most quizzes treat Gryffindors like drunken frat boys, incapable of opening a book, and ready to punch someone in the face at the drop of a hat.
Bravery doesn't mean stupidity. In fact, in order to be brave, one must recognize their fear, and then push it aside in order to go on with what must be done. While Harry, as well as James and Sirius, often displayed a reckless streak, not all Gryffindors are the same, and cannot be painted with the same brush. (Nor can any of the houses). No one could argue that Minerva McGonagall lacks common sense. Or Hermoine and Dumbledore for that matter. Most of these quiz questions don't put you in tough situations either, such as having a friend or family member in mortal danger.
...After that speech, I'm sure you can tell I count myself a Gryffindor at heart. Ex_gratia
could tell you that I'm not a reckless person, and I am often seen planning ahead for something. Throughout school, like a Ravenclaw, I worked excessively hard at my studies, and graduated at the top of my class. But I have also tried to stand up and take risks when needed, and I am fiercely protective of my friends, family, and students. And while at work as a teacher, I behave like a Hufflepuff. All students are welcome in my class, and I will teach them all the same. ...Just like in my swaps.