Positive developments in characters, especially a character that goes on to make something good out of themselves.
I like pinpointing moments of change in a story and watching the drama unfold.
Feeling a slight sense of envy I didn’t write the story/novel I’ve enjoyed is a good sign - and nothing but a compliment to the actual author!
Entertainment! There are times I want to learn (I turn to non-fiction for this usually) or to be deeply moved but I usually want to be made to smile/laugh, which is probably why I’m such a fan of Pratchett and Wodehouse. My mother, who taught me to read, has never liked funny literature. Maybe this is a more subtle way of rebelling!
Characters who definitely did develop in some way be it for good or evil.
A plot I can follow no matter how many twists and turns it has!