It has never been a huge question for me: I've been always marketing my personal photo rather than a logo or an avatar (in fact, I can't even change it for anything that could reflect my current age because once I do, people stop interacting with my social media shares, probably because they don't recoghize me).
Is the social media trend moving away from non-face (anonymous) avatars? LinkedIn has been requiring a headshot as an avatar for ages. Google Plus is more aggressive in doing that:
- Faces are given competitive advantage because they can make it to search results (unlike any other types of G+ avatars)
- Whenever you try to upload anything that is not a face to be your G+ profile, you are mildly prompted you are doing something wrong: