@thor You can fetch and analyze your favs via API.
Using the Mastodon Python wrapper this simple script returns a quite raw output, just printing lines with the number of toots you faved and account/display name and user url like:
"14 ('thor', '⚒️Thor, the Norseman⚒️', 'https://snabeltann.no/@thor')"
https://gist.github.com/encarsia/5de9c895c3f009af9fa33e18784a77ec
This should answer your question.
@encarsia Well, yes, as a developer, I could do that. Now solve it for everyone else.