I was just thinking about what got me into different things like anime/ games/ comics etc and thought it would be fun to see what brought others into the fold. For me it was
Anime: Princess Mononoke, saw it when I was 10? And it completely floored me with the art style, story, and lore. Still my favorite anime movie to this day.
Video games: Sega Genesis/ sonic the hedgehog and altered beast with my older brother were great times when I was little and got me into gaming.
Comics: Spider-Man and X-men on fox kids in the 90s and Spawn in 97. My first official comic/ graphic novel was Wolverine: Origin
For cartoons it'd have to be Shadow Raiders. They have planets that eats other planets, it's like the Gigastructures Stellaris mod as a 90s cartoon.
For anime I was lucky and caught Hunter D: Bloodlust in 2001, then picked up a copy of Mushishi on DVD from a local library.
For games It'd be Age of Mythology and CoD 2.
Those were the days.