Board Thread:Naruto Discussions/@comment-28004148-20160318203231/@comment-734582-20160319123143

UltimaDude wrote: Have Mangekyo abilities revolved around the users personalities? You can explain the Mangekyou powers as a reflection of the dream people lost.

Obito lost his connection to the world and gained the ability to disconnect from this world.

Shishiu wanted to change the way people saw things and gained the ability to force people to take his opinion.

Itachi wished to change the world, but saw his friend's dream destroyed. He gained the ability to create his own world and the ability to destroy others. Amaterasu can also be seen as the fire (Uchiha) that destroyed fire (Uchiha).

Sasuke gained his ability by being an Uchiha that killed an Uchiha. But he controlled his hatred and so this power.