After a long time, you can now add a personal avatar to your user profile again!
Just select "Account and setting" on the top-right menu and click SET A NEW AVATAR, then follow the instructions.
If you change your mind, just repeat with another image.
This time the image is not strictly related to a game gallery image, so you don't risk that an editor will inadvertently delete it.
The stored image size is also bigger, so in modern screens will not look blurry.
There are also some color editing options, but I have just discovered that will not work on Safari because Apple decided to propose a new way to handle those things. Sorry.
I have tested it a bit these days, but if anything break just leave a note here.