Love the characters, love the relationships (especially familial, but also friendship, romance, employer/employee, and more) between the characters and how they develop. The worldbuilding is fascinating as well. And the plot is... I'm not sure how to describe it. It slowly unfolds, I couldn't predict until near the end what the final climax would involve (unlike some books where the goal is clear just way of approaching it and whether the goal succeeds in the way the character intended are what are surprising). However, none of the several twists and turns hit me out of the blue, there were little hints throughout so I gradually saw things unfold.
The ending does leave me wanting more, but not in a "wait that's it?" sort of way. In some ways it's open ended about the future, but the arc of the story is resolved. I would love to see what happens next to these characters and this setting, but also the pieces that are open ended are fun to speculate on, not leaving me unsatisfied.