Downplayed: Bob is loving and kind. boB is angry and lashes out at people from time to time.
Bob's "Evil Side" is just his negative characteristics (anger, pride, etc.) and he has to suppress them.
Justified: A traumatic event triggered a rage inside Bob that is battling for control.
Inverted: Alice is a villain who develops an heroic split personality.
boB is a mentor personality who guides Bob to do the right thing to do.
Subverted: A traumatic event triggers a split personality inside Bob. This new personality was created to help Bob get through his problems.
Double Subverted: That was a ruse. The new personality is manipulating Bob and giving him bad advice.
Parodied: Bob has a Complete Monster in fetus form literally inside his brain.
Zig Zagged: Bob has four personalities; boB, a Complete Monster who loves to rape children; Mark, a Straw Loser who bluffs to burn people down that used to be Bob's original personality before he had a traumatic incident; Tom, a Stepford SmilerBroken Ace that he developed as a defence mechanism; and Tim, a Friend to All Living Things who is a moral compass to Bob.