This is clearly a question you must answer for yourself. Here are a few questions you can ask yourself to help you decide what your answer will be.
1. Did you enjoy meeting all of these medieval characters? Did you feel like you learned something about people in the age of Chaucer?
2. Did you enjoy trying to figure out who were the good guys and who were the bad guys?
3. Did you enjoy the irony of several of the characterizations?
4. Did you find yourself intrigued by any of the specific characters and then want to read their tale specifically?
5. Did you enjoy trying to figure out Chaucer's satirical targets in several of this character's/characterizations?
6. Did you enjoy how the prologue to a tale related to the tale itself?
7. Did you enjoy the genre of specific tale? (ie. fairy tale, fable, mock heroic, comedy/joke)
8. Did you enjoy how the tale told related to the characterization of the person telling the tale?
9. Did you understand the tale's plot, theme, moral?
10. Could you see any interrelationship between the different tales? (ie, about marriage, about pride, about revenge)
Your answers to these questions will help you decide where you found the most pleasure. If you mostly enjoyed #1-5 then you are a "Prologue" person, if 6-10, then you are a "Tales" person. You might also ask yourself, what are you most likely to remember from your study of this work? Why do you think you were asked to read/study it in the first place? Where does Chaucer really seem to shine in terms of writing talent? Those answers may help you as well! Good Luck!