In August 1991, I went to a flea market at the school across the street from my childhood home, and found my first set of polyhedral dice (now long lost), a clear orange set someone was selling off with the rest of their AD&D stuff. I bought them for $5, the entirety of my allowance at the time. Shortly after acquiring dice, I began running my first "campaign" with my friends, a mostly incoherent collection of combat scenes involving various characters we had all created battling the Foot ninja clan. I like to think I've improved slightly in the intervening decades.
Overall, it's been a good thirty years of gaming. Here's hoping for at least another thirty.