Hello Jocke,
I’m also like your idea about tags and would really love to see a way to more categorize items.
A suggestion I made some time ago, was to assign more groups to one item. So it would be possible to use the group system to categorize.
Like a restaurant that is assigned to a group of pizza places but also in a group of restaurants with for example children playgrounds.
Assigning one item to more groups, is a tricky one as Zsolt mentioned.
As for tags it could be easier, but I think its difficult for users to anticipate which tags are existing.
Or do you have an idea how user could easily see which tags are available?
greetings, Michel