And do you know what he wants to be more than anything? A teenage girl.
Because You Were Nice to Me: Hobson decides he won't smash Mokuba in the future because he is the only one in the house who was nice to him. Presumably, this plus The Dog Bites Back is the reason he sides with the Kaiba brothers in Seto Kaiba vs the World.
Berserk Button: Crump only needs to say "friendship sucks" to get Tea to come back and duel him.