Random idea I spontaneously had and would like to see, but won't try to set up and host myself because I know my ADHD.
A site set up like a fanfiction site, but instead of posting stories and having people comment on them, you can post any kind of text about retrogames. Be it reviews, ongoing play reports, or general thoughts about genres.
And people can rate them, and you can browse tags for games, series, genres, and so on.