Board Thread:General Discussion/@comment-35233810-20180406192057/@comment-30250591-20180409220219

Ichigo's reflection on his defeat of Aizen makes it seem like he desired both to be the Soul King as well as to be a "nicer", more interventionist one. Either that or he was arrogant and thought he could do a better job.

Aizen had loneliness in his heart as well as the swing of his sword. It seems that he cared about himself, but many things he did seemed to make individuals more powerful than they already were, and he wanted something to be as powerful or at least somewhere near his level.