I'm amused by the fact that a Chaotic Evil character will become Lawful Evil if they sell their soul.

"RAaaah! I, Grognar Fleshrender the Barbarian, will do anything to get more power so that I rend more flesh! Now I sell soul for more vicious fleshrending power! There, I sign stupid contract and... suddenly, Grognar Fleshrender feel need to wear suit. Maybe switch to rending flesh only within acceptable legal framework."

Also, if Grognar should become chaotic again, the deal is off. Hmm.