Thank you so much for your compliments and your feedback!
From your response, I feel that you were brilliant in perfectly understanding my idea, when I tried so hard not to be understood with my rambling text ;)
I like the idea of cards for quests. Although I gave no explanations at all on how this game should be implemented by the players (yet), in my head they were using post-its or index cards to write character sheets and quest sheets.
I can see your suggestion for using predetermined cards for quests totally working with already established genres/settings. Something like: the western quest deck, the low fantasy quest deck, etc…