I think he has probably gotten the best balance: Kevin Conroy Crowned Ben Affleck as Best Batman Over Christian Bale Despite Hating His One Aspect That Angered Fans - FandomWire

Kevin Conroy once shared during an interview that he preferred Ben Affleck's interpretation of The Dark Knight more than that of Christian Bale's

Michael Keaton Isn't Jealous of Ben Affleck: 'I'm Batman, I'm Very Secure in That', Page 2

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Michael Keaton Isn't Jealous of Ben Affleck: 'I'm Batman, I'm Very Secure in That', Page 2

On Popular Demand, Kevin Conroy's Batman: The Animated Series Returns for Another Epic Run - FandomWire

Michael Keaton Isn't Jealous of Ben Affleck: 'I'm Batman, I'm Very Secure in That', Page 2

Batman Actors! Ben Affleck vs Christian Bale vs Michael Keaton vs Kevin Conroy

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I think he has probably gotten the best balance: Kevin Conroy Crowned Ben Affleck as Best Batman Over Christian Bale Despite Hating His One Aspect That Angered Fans - FandomWire

Michael Keaton Isn't Jealous of Ben Affleck: 'I'm Batman, I'm Very Secure in That', Page 2