Postcrossing is an amazing idea.
ABSOLUTLEY EVERY KIND OF POSTCARDs ARE WELCOME!
Only religious postcards aren't *my thing*..
It would be nice if you would write more than only "Hello" and the "Postcard-ID".
Maybe also some words in your own language?
Maybe you want to draw something on it?
Nontheless if you only write Hello it's also okay!
I like cards which have to do with your hometown/country you live in most. But as said - every postcard with every topic and every written word or whatever is very very welcome!
The postcards can be new, old, tell a story, maybe also a historical memory like... dunno, a postcard from a different decade...
If you receive a postcard by me I would love to get to know you so please feel free to send me a message!
Also if you are just looking around on profiles, feel free to send a message - I love to get to know new people ;-)
Now a little bit about myself -- maybe this also can help you to find a kind of postcard which I might like aswell!:
I like: music, riding motorbike, travelling, languages, cultures, history, model constructions (american big trucks), watching tv, photography, scuba-diving, going to cinema, reading, painting, writing, playing NES & SNES (lol) and much much more.