When I started using sites like Goodreads and so on, I devised a basic rating structure for myself to use. Which is:
| 5 stars = Brilliant. A favourite |
| 4 stars = Really good |
| 3 stars = It is ok |
| 2 stars = Meh! |
| 1 star = I did not like this one. |
Half stars are only used when I'm not sure if I want to go up a notch.