Earliest/most specific special interests?

Also this would count, right? Correct me if I’m off the mark. One of the earliest ones I can pin down is Dragon Ball Z. Specifically that run moreso than Dragon Ball or GT. My brother (also ND) and I lived and breathed it for years, incorporating it into our playing to the point we begged our neighbor not to destroy a wasp infested rock in their yard because we were using it as a tournament. I ended up being Goku’s adopted son. I know children are pretty obsessive but it took years for me to really like anything else. Except for the Metal Gear Solid series. Even now (when I haven’t played it in forever) someone could bring it up across the room and I would parkour my way over to infodump ad nauseam. It will forever live rent free in my head, in a presidential suite. There are others and I even love to still talk about the Dragon Ball franchise, but Metal Gear always feels like coming home, letting your bare feet sink into plush carpet with your favorite living (or nonliving) companion.