[quote=@Lord Orgasmo]
I think the first actual anime I watched was Jojo's Bizarre Adventure. After that it was Fist of the North Star. Unless we're counting either Avatar: The Last Airbender or The Boondocks, then it's one of those.
[/quote]

I'd more or less count the Boondocks as you'd have been likely old enough to have not just stumble upon it late at night on television. At least I assume so as I never did as a teen watching Adult Swim in the early 2010's.