Oh, this was a really fascinating read! I used to take online personality/character quizzes all the time online but have stopped doing so in recent years largely because of the lack of "high quality" quizzes and results out there, and I think you articulated why that is and the ways a quiz can be done well brilliantly. :)

Sadly, I've stepped back from active writing myself at the moment for a variety of reasons but I still love leaving comments on various tags over at AO3 when I can. I'm sure those you leave comments for greatly appreciate them! ♥