What is worse Halloween Costume Party Etiquette?

(Option 1) -> Getting so into the character behind the costume that you refuse to acknowledge your other self at any moment – no explanation except before or after party.

or

(Option 2) -> Refusing to get in costume because you can’t do a half-assed character – but able to explain your lack of costume to anyone who asks at any time.

or

(0ption 3) -> Sacrificing a personal high value of sincerity in exchange for an 80% fun party with the kind of people who you assume would want you to denounce your principle to be with them.