Maybe im just not good at this rating thing, but if i enjoy an anime, I give it a 10 out of 10. No anime is better or worse then another, just different...apples and oranges in my opinion.

I enjoy watching Naruto. I give it a 10 out of 10.
I enjoy watching Full Metal Alchemist. I give it a 10 out of 10.
I didn't enjoy watching Scrapped Princess. I give it a 0 out of 10.

The music on the other hand, I can rate. Wind rocked!! 10 out of 10! =^_^=