Considering the length of his sword, he's probably really insecure about his tiny penis.
I think his character was way underdeveloped and flat. Crisis Core did nothing to deepen it. This usually isn't a big deal, but when he learns about his history in the Shinra Mansion basement, it's like the creators were trying to give him some kind of justification to do what he did. Maybe that would have been more believable if he had ever had shown feelings in the past, or if he had a girlfriend.
I think his character was way underdeveloped and flat. Crisis Core did nothing to deepen it. This usually isn't a big deal, but when he learns about his history in the Shinra Mansion basement, it's like the creators were trying to give him some kind of justification to do what he did. Maybe that would have been more believable if he had ever had shown feelings in the past, or if he had a girlfriend.