In reply to Omaar Osmaan.

There are other options, too. Namely Pavatar and Favatar, the latter one being an ages old invention (see eg. Favatars (and Favatar WordPress Plugin), written in 2004 (!)).

If WP would support those natively, eg. Favicon as a "enable by choice in the settings" or auto-enabled fallback .. all would be well ;)

cu, w0lf.