What I always asked for:
-Nice underwear and socks
-Candy of my choosing
My wife would send me a 16g flash drive with new movies/shows and naked pics on it. I would download those and send it back. She would then load it up and send me more. It worked really well with 2 flash drives always moving.
If you send a package, make sure you fill the box so it doesnt break open and spill out!