I'm sure my Asian readers will be more familiar with the sticker picture phenomenon that was so popular in the late 1990s to early 2000s. My friends and I always took sticker pictures when we got together, and traded them among ourselves like baseball cards. It was always fun to find a familiar face on someone's sticker picture collection, to exclaim, "I didn't know you know _____!" I used to collect all my sticker pictures in my planner, which I personalized and made pretty with tons of stickers and colored pens (decorating planners was another trend back then). Here's just one page out of the dozens I had in my planner: Slowly, the sticker picture fad died out and was soon replaced with...