I dislike the fact that an autogenerated username is tied to my official email for every new WP site I setup. I have my own usual username, and to achieve that I will need to create a new admin. Logout. Login into that new admin. Delete my autogenerated profile. Then recreate it the way I want to. If you're going to create an autogenerated username with my email (and the pair can't be changed), are you able to create an auto-generated email as well? And allow me to create the admin account the way I'd like to using my email and username.