This issue seems to be different from others reported previously in the Meta SE (and I have looked at them all). These things I identify in this message.
Without having changed my profile (or email address) in since I have been a SE member (about 6 years), my gravatar (which I grew attached to) disappeared and something else popped up apparently called an Identicon from my readings here. I have used my common profile on all SE sites all had identical email addresses.
I understand from reading other meta SE entries that gravatar and identicon apparently are different. The Gravatar uses email addresses, and the Identicon uses IP addresses. I can assure you that I have used a fair quantity of IP addresses over the years to access the site for periods of time but the avatar assigned to my name never changed (till now). Thus I would have expected the Identicon to have changed over these periods of time.
I tried to select my original gravatar under the profile picture option. As was posted in another Meta SE posting to no avail. The gravatar was not available as an option when attempting to change it. The Identicon option was present however. This is for ALL SE sites not just a single one. As the postings of the Meta SEs seem to have this isolated to one site being different from another.
The lack of a gravitar under the selection seems puzzling since I have had the same email in my common profile without change. So one question is why I don't have a gravitar selection but to have an identicon selection under my profile conditions?
I'm confused as my (valid) email address has been previously used in a couple of SE communications and again has not changed since I created my initial Server Fault account over five years ago. This issue was listed in yet another Meta SE posting but not true.
I tried to set the email address to the same thing that I had it, but the gravatar did not return.
Because I could not return my Gravatar, I uploaded a cute picture until I could get a resolution.
What am I missing here?
NOTE: Remember the question...how can I get it back within the SE framework?