Love the old fashion of sending/receiving postcards, especially from all parts of the world.
Do send me a postcard from were you live, I also like animal cards ... but in the end all cards are welcome ;-)
Though I am not fond of cards with religious comments, self printed cards, free adverts cards.
Save these themes for those that indicate they are happy to receive them.
Yes, expired cards I also have ... but I rather mention some milestones for myself:
20190706 Received my 250th card -> RU-7379560
20190702 My 250th card send and received -> NL-4415192
20180330 Received my 100th card -> BE-569923
20180407 My 100th card send and received -> NL-4081376
PS ... sometimes surprised if an expired card still makes it after more than 60 days :-)
Received a card from Olean, New York (US) which was send 5 November 2018 and which I received 12 November 2019! More than a year travel-time .... yes ... can be slow sometime :-)
*Sorry, I won't register cards I haven't received; it's also against Postcrossing rules