I enjoy receiving these types of cards:
2) animals- (no insect please)
3) US states-(Best design ever)
4) Map card-
5) masterpiece from Van Gogh and Monnet or other impressionists
6) Official GF series- (I am collecting them as my teaching materials)
Anyway, send me any kinds of card that you would like to receive.
If you don't have any idea, you may share....
identical foods from your region
tennis (who's your fav player in both WTA and ATP)
Taiwan(maybe your first impression)