Personal labels/tags or whatever they are called for both users and communities would be awesome to have in the standard lemmy front end. I think some apps or other formats might have them, but I do like the default lemmy interface and they would be extremely handy to have saved by an account for personal reminders.

Some examples would be the ability to set personal reminders for uncommon rules on specific communities or who has good takes on some random topic. There are just so many of both and it can be hard to keep similarly named things straight.