When I joined Twitter in 2009, I was just mirroring my Identi.ca, where I'd coined #fic_rating for fanfiction micro-reviews with machine-friendly structure.

The reference I wrote is still up:

https://gist.github.com/ssokolow/3793644
https://hashtags.fandom.com/wiki/Ficrating

It wouldn't make sense to summarize those, and I stopped updating Identi.ca when I stopped the micro-reviews, so I'll just point at it for now.

https://identi.ca/ssokolow

Maybe later I'll use Mastodon's higher limit to revisit them for a "top 5" run-down.