My rating system is as follows:
5 Stars: I loved it. I will probably read it again. Great plot, great characters.
4 Stars: It was really good, but is missing something.
3 Stars: It was okay. I didn't have to force myself to read to read it, but it wasn't spectacular.
2 Stars: It wasn't that great. Could have an incomplete plot, set up, characters. Could be unbelievable.
1 Star: Bad. Will never read again. Boring. Bad plot/characters
Unratable: Couldn't finish it. I won't rate a book if I haven't finished it. I will review what I did read and explain why I couldn't finish the book.