Stop haxing Sasugay

Sasuke's 'armor' thing is interesting, behind his back. He obtained Amaterasu from his brother, as well as the Mangekyo. I just love how the Mangekyo Sharingan changes appearance from user to user, I wonder if it has to do with how strong they are, or if it's just unique. Another thing I didn't understand is.... How come Sasuke isn't using his Cursed-Seal combined with the Mangekyo Sharingan? Or has he lost the seal because he killed Orochimaru? They never explained that in the story. What about his 'snake' powers? -rolls eyes-

The story annoys me sometimes.