My preferred type of books are:
- Must have a healthy dose of non-cliche
- Strong female leads
- No morally dubious relationships (teacher/student, abusive)
- Healthy LGBT relationships that aren't shown on the cover or stated that it's in the summary (homophobic parents)
- No insta-love
- Good chemistry between characters, especially those in a relationship
- Good villain
- Deep thoughts (like We Are The Ants, for example)
- Good description (I could literally feel and smell the garden around me in The Secret Garden, for example)
- The perfect blend of light humor and dark elements
- Political commentary (subtle, although I guess non-subtle works as well)
These aren't required, but I love books with these! For example, I don't like Twilight, The Selection, or Throne of Glass series, but I do love Simon vs. THSA, We Are The Ants, Song of Achilles, Diviners (!!) and more!