I collect stamps but I think I have enough. I play guitar my own way and I like computing databases for fun. I love reading books specially about travels and history.
My favourite postcards? Maps, Unesco Sites an Bridges. But I will do with any postcards with real images from your country, specially if they have a story to tell like bridges, rivers, mountains, railroads, and.. maps... I do not like modern buildings particularly.or town views (not multiview postcards either).
Please, do not send blank postcards. Write something on them. If you use an envelope, stick a low value stamp or an old one onto the postcard.
But do not worry too much. Send what you have at hand.
I appreciate nice stamps.
Best wishes from sunny Ibiza.