Personal mail is always a delight, especially letters and cards with interesting or colorful stamps, and a personal note. All types of cards are most welcome. If you want suggestions, my favorite international cards are single view cards with pictures of your country - UNESCO World Heritage sites, scenery, buildings, local people, city views, etc. Among non-view cards, I LOVE Inge Look's old ladies, Norwegian trolls, Diddl, maps, and cards reflecting local culture.
For US postcrossers looking for ideas for tags and round robins, I especially like national, state, county, and city parks, libraries, courthouses, COVID-related, science and math, and political, but I'm really not picky at all. It would be great to receive any card that makes YOU smile, with an explanation if not obvious. Don't worry about avoiding duplicate cards. The personal notes on the back make each card unique. I also welcome handmade cards or those with your photos.
I like reading, travel, family activities, live theatre, walking, and bookcrossing. (See my profile, http://bookcrossing.com/mybookshelf/hootnoodle. There's even a small picture there from our 2007 trip). My husband and I have been married 46 years and have two adult children. We both retired in the summer of 2015, and are looking forward to more trips, both near and far. Of course, travel and live entertainment events are on hold now.
I hope that projects like this with person-to-person connections help people see each other as individuals. Our governments do not always represent us well. I certainly disagree with almost everything in the Trump administration, which seemed intent on trashing most of the values that I hold dear. I feel like I can breathe again now.