To rate or not to rate

I'd like to thank everyone who took the time out to give me your opinion on whether or not I should have a rating system. After some thinking, I've decided to rate the next three books I review and I'll do it via the old gymnastics "perfect 10" system. Why? You may ask, well I named my blog the "Book Vault," and while I was thinking of a giant vault filled with books, I also realized that the vault is one of the appartuses for gymnastics. Not all too long ago, gymnasts were given scores out of 10 for the difficulty & execution of their routine on each apparatus and of course prefect 10's were few and far between but there were some really amazing gymnasts & routines that got those perfect 10's.
So I'll rate the next 3 books I review and see how things go from there--please give me your feedback!