I’ve always been drawn to more dynamic covers with semi-realistic portrayals painted- no photos. Examples I can think of are the Percy Jackson book covers, Ella Enchanted, Mistborn, The Locked Tomb Series, etc.

Those are among some of my favorite covers that drew me in because of the art, and while there have been plenty of books I was interested in too because of more abstract covers, the style I referenced above continues to impress me the most.

As for least favorite, I agree with movie image covers. Hate them lol