Which two measures are often at odds when you are trying to evaluate whether a book is good or not?

The question is very personal.For some people there are certain measures that make a book godd and for others the measures are completely different.For me the two measures at odds are whether the story is narrated in a way the reader gets so involved that the book is unputdownable and the other is the characters.If I get trapped by a story in which the development and unpredictability of the characters make me continue reading , the book is good for me.

my dad purchased natural colorings in a specialty store

the answer should be:

the intervention of the supernatural gives gilgamesh hope that he will defeat humbaba.