imagine having your #Contacts, #Followers, and #Lists, and any details, like email, phone number, address (yes, to talk and meet them #IRL ;-), all together in one Private space !!
(no being forced to share your address book like WhatsApp, Facebook, Twitter, or Google).
Whereas with tags, categories, or lists, to help sorting out the Contacts. It would also solve the problem when some networks do not have Private List at all. I'm watching you LinkedIn ;-)
Any idea or suggestion #Mastodon ?