It's a big pain in the butt.
quote from https://forums.opera.com/dashboard/plugin/page/help -
"When creating your Gravatar account, be sure to use the same email address you used to open your Opera account. If you already have a Gravatar account, you can add an additional email address (the one you've associated with Opera) to assign a new Gravatar in the Opera forums."
On the surface Gravatar looks like it would save you time and effort but I've spent more time trying to figure out how work this WordPress Gravatar than if Opera Forums just had a simple apply your own pic avatar image inserter.
Hi @jemcrystal, I realize, that this is not exactly what you're asking for, but you can use either Gravatar, or choose among the provided images: go to your profile, click "Change avatar", and select an image, then click "Save avatar" ;-)
I agree. It was MUCH SIMPLER when it was the old "MyOpera" version. I do NOT have anything against change.
These are the Question:
1) What if you are already a sophisticated user and have your own icons and avatars??
2) Why is it that Opera cannot put back some of the features that were present in the old accounts??
They were MUCH simpler and easier to use. In addition, it addresses Security Concerns about Gravatar.com and Automattic hosted Web sites.