And yeah, I rewatched Guilty Crown for like 4 times and never get bored of it. The story is so touching tho specially..
Spoiler
At the time when Inori declare that she'll always by Shu side whatever the situation if, Even if the whole world hate him, she'll always stay by his side.
Why the heck would you rewatch a anime when you could have used that time to watch another anime you never watched before and from it gain new experiences.