I actually do both. For shorter and more general notes, underlining is sufficient. However, if it's a key statement or something that I might use in a future essay or discussion, I will quote it. This way, I have a more detailed and accurate record of the novel's content.
I choose to quote. By quoting, I can have the exact words in front of me when I review my notes. It makes it easier to accurately recall what the author said and to use those quotes in any further discussions or writings.
Chapter 417, "The Real Struggle for Survival has Just Begun", is the clearest early answer because it turns Nina's situation into a concrete plot event.
Chapter 582, "Fleeing Hastily", is the clearest early answer because it turns Guo Xing's situation into a concrete plot event. Early on, Luo Xuan pushed her away, disappointment filling his eyes.. By the end, Only Ai Xiaochun, lacking the strength to go on, was left behind and....
Chapter 260, "Did You Take All These People Down?!", is the clearest early answer because it turns Chixia Mountain District's situation into a concrete plot event. The chapter gives readers a real answer by opening on Yan Dabiao, who deeply felt the sting of deception, flew into a rage...
Chapter 486, "So It's All Set Up, Right? Then She Will Set Up Too!", is the clearest early answer because it turns Jiang Yan's situation into a concrete plot event.
Chapter 164, "Congratulations to Jiang Yan for scoring one point!", is the clearest early answer because it turns President Shang's situation into a concrete plot event.
Chapter 225, "Just 100,000? Are you buying mineral water for the boss?", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event.
Chapter 140, "Did Jiang Li Finally Crash?", is the clearest early answer because it turns Brother Yan's situation into a concrete plot event. The chapter gives readers a real answer by opening on In the evening, the setting sun was like blood, dyeing the entire...
Chapter 323, "This Person Has Ulterior Motives", is the clearest early answer because it turns Feng Shui's situation into a concrete plot event.
Chapter 361, "Kids Make Choices, Adults Want It All!", is the clearest early answer because it turns Tong Yi's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Everyone knows that Suqing's forte is Double-sided Embroidery," Miss...
Chapter 475, "Doting on the Man You Love to the Fullest", is the clearest early answer because it turns Jiang Yan's situation into a concrete plot event. It opens with On the other side, Jiang Yan and Shang Shuyue also set off.