My favorite was definitely Magic the Gathering, I could spend hours just looking through cards. The MtG universe is HUGE! Still, those tamagotchis tore through my elementary school like an electronic plague!
Think I might be the only person I know who has marbles stashed away somewhere
I bought most of my MTG cards just to stare at, I didn't know the rules for years,
Your not the only one, I lost a few but I still have some of my marbles xD