Since I can see the games I've played in "Things to Rate" and "Ratings & Reviews" I think an option to hide them when logged in would make discovering new games easier.

edit: I meant hide when browsing games/tags

Yes, please. Or to remove games from recommendations at least. What do I need to do to remove a game from there?

If you can run the tampermonkey browser extension, I made a tool for hiding games manually.

https://itch.io/t/3477347/add-an-option-to-exclude-owned-games-when-searching