For a week, i searched repository of plugin database and can't find a "very good" plugin for character / personality tests. I found a character test plugin working, but it's not developed for 2 years.
But its logic is quite easy. The answers are poles for the question. And those are categorized under test options under the name of "Personality Dimensions" which are just typical categories for the answering mechanism.
IMHO, without breaking your plugin's quiz algorithm, you can add this feature to your Quiz plugin. Actually, its a humble request for this awesome plugin. :)
Please take a look at this plugin...
Waiting for your reply,