About Alex...
I'll be very happy with whatever you send me!
But...if you'd like more 'guidance'
I tend to prefer postcards with drawings/paintings/ images rather than photographs (my favorite themes are an exception). Interesting stamps are always greatly appreciated.
I love all kinds of mail art (i.e., self-made postcards, envelopes, etc.).
At the same time (and possibly ironically), I also love postal stationary (i.e., state-issued postcards, envelopes, etc.).
As for specific themes -- and, please feel free to ignore this list! -- I'm particularly keen on: space, industry, labor, railways, mail/post. I also love vintage cards, lenticular cards, and maxi cards. As for advertising cards -- I'm very keen on anything about art shows, museums, or theater festivals / plays.
I'm also interested in direct swaps of mail art, letter press art, postal stationary, and pictorial postmarks.
Alex