I've seen this in many other spots and I think it would be fun here, too. There are 30 questions and you answer a question when you come to this spot. You don't have to do it 30 days in row, you can take breaks.
Day 1: Favorite male character?
Day 2: Favorite female character?
Day 3: Favorite friendship?
Day 4: Favorite couple?
Day 5: Least favorite male character?
Day 6: Least favorite female character?
Day 7: Least favorite friendship?
Day 8: Least favorite couple?
Day 9: Favorite actor?
Day 10: Favorite actress?
Day 11: Favorite season?
Day 12: Least favorite season?
Day 13: Favorite quote?
Day 14: Favorite episode?
Day 15: Least favorite episode?
Day 16: Favorite elevator scene?
Day 17: Favorite surgery?
Day 18: Favorite place in the hospital?
Day 19: A scene that made you cry?
Day 20: A scene that made you laugh?
Day 21: A scene that made you angry?
Day 22: Most epic Grey's Anatomy moment?
Day 23: The character who you miss the most?
Day 24: Favorite season finale?
Day 25: Saddest death?
Day 26: Best dancing scene?
Day 27: If you were ill, who would you want to be your doctor in Seattle Grace?
Day 28: The most underrated character?
Day 29: The most overrated character?
Day 30: Your all-time favorite thing about Grey's Anatomy?