Maybe that's why elaborate scrapbooking is so popular, now. With no more paper souvenirs, they've got to fill up the page with other stuff.No souvenirs, either. I kept paper airline tickets, train tickets, concerts, movies, all kinds of tickets as souvenirs.
DS has solved the passport/souvenir issue, though. He gets stickers. His travel case looks like a modern version of an old 40's suitcase - hard shell with a sticker from every place he's been. His car is his "passport stamp book," with duplicates on the windows and bumper.