My name is Marcin and I live in Poznań, in Poland. I like... no, I love history, so if you want, you can write me some stories or even legends from your city or country, which not everyone knows. You can also write something in your native language. I am trying to learn Italian and I was learning German once (I want to learn more and more language, but sadly I haven't enough time). I know some ancient language too - especially Latin, ancient Greek and Akkadian (they'd written in cuneiform). It's amazing when you understand a language, which last users died about 2500 years ago.
I haven't any special recommendations about postcards - it will be great if they show a landscape of your area, historical buildings or just symbol of country/city where you live. If you cannot find this kind of postcard - don't worry.
My second (but it doesn't mean the less important!) passion is travelling. The big one and the little one - you never know what you can see just behind the corner.