The story has potential but something (plot holes, unanswered questions, lack of chemistry/attraction, etc.) leaves it falling flat.
The story is predictable with very few surprises, making it an easy read that may or may not leave the reader feeling like it needed more.
The story might sound like a tried-and-true trope, but the surprises thrown into the plot keeps the reader interested enough to want to know what's going to happen next.
The story has everything the reader wants. Drawbacks would be minor and easily overlooked.
The story pulls the reader in, keeps their attention, surprises the reader with unexpected developments, and produces a happy ending that makes all the emotional upheaval experienced while reading worth it.