Dangerous situations, well-developed-flawed characters, plots within the plot and budding romances. And of course, magic! 
 le sigh 
 What sane reading addict wouldn't adore this? 
 "Many boys will bring you flowers. But someday you'll meet a boy who will learn your favorite flower, your favorite song, your favorite sweet. And even if he is too poor to give you any of them, it won't matter because he will have taken the time to know you as no one else does. Only that boy earns your heart." 
 "I will have you without armor, Kaz Brekker. Or I will not have you at all." 
 Can't decide who I am shipping more, Kaz and Inej or Jesper and Wyland.