[He couldn't really ask something like that. Not if he intends to sacrifice himself to become the Pillar. No, falling in love right now would prevent that from happening. It's a very complex situation.

That Kaiba could control the heartless wasn't really new information that he was journeying into the darkness and speaking to people like Maleficent was a touch jarring.]

You must have a very strong will. A person less sure of themselves might have given into the darkness long ago.
I think the darkness isn't so much bad as it is difficult to control. Even if you think you have a handle on it the darkness could still slip up on you if you weaken in your convictions.

Since you have first hand knowledge of it do you think that is the case?