About ratings
Mostly to give me a scale and stick to it (one can hope)
5 stars : I had a blast/it rocked my world/I'll cherish this book forever
4,5 : Almost there
4 : I loooved it
3,5 : I loved it, but not enough to be blind to its flaws
3 : I liked it
2,5 : it's okay / I'm annoyed, but I could find a little speck of something.
2 : bad experience
1 : I'm foaming at the mouth