I love books, milk, chocolate, cows, rainbows, and pictures of stunning, scenic nature/city views.
I would also like postcards of famous cartoon characters - such as archies, tintin, anyone from disney/pixar, doraemon, pokemon, hello kitty, my little pony, jem & the holograms, care bears etc.
If you don't have any of these, just give me a cool-looking postcard - I'll leave that up to your judgement. :)
For a better idea of what postcard I may like, you can take a look at my gallery of favourite postcards http://www.postcrossing.com/user/nylusmilk/gallery/favourites