Pseudo-random default avatars
Make the default user's avatars more random. Instead of just being a circle with the first letter of the user's username, use some hashing algorithm to generate some sort of identicons. An idea very popular nowadays (Github, GitLab, Gravatar, Slack, etc)
Ray Piller (VertigoRay) commented
I completely agree. I would also prefer sucking in the avatar from GitLab as the default/starting avatar, if that's the means for user account creation.