I'd like to be able to add colored labels/tags to my owned domains to help sort through them and remember what names are intended for what purposes etc.
These tags would not be visible to other users, just myself
It'd also be very nice to be able to add private tags/labels to any domain anywhere in the site, which could help with bidding strategy, scheduling auction opens, and just generally remembering things about names like ideas for what to build with them.
A public tagging feature might also be nice to have but would introduce additional challenges like content moderation etc. and I'd personally still want a private option.