I have never really been a fan of people changing their avatars as i strongly associate people with their images. That being said, i do understand how an avatar might become outdated or outgrown, i just wish people were thematic in their choices, like stick to a single character or aesthetic. If i ever change my Brian Cox laughing in Troy avatar it'll be to another laughing or grinning person, maybe pointing or flipping the bird, you know, another avatar that still says 'oh, that's obviously Bingoogus'.