For me? The first anime related thing I saw as a kid was Spirited Away on VHS, I was awestruck from the animation and quality of the film.
For shows it would've been the usual Pokemon and DBZ. As I grew older I suppose my first proper anime show was watching streams of Neon Genesis Evangelion due to people talking about it at school.
I remember when it came out, people on forums kept talking about it nonstop. I had no idea what it was, so I just blindly torrented something called Death Note... it was the live action Japanese adaptation lol. I didn't even know it was an anime until years later. Just for years I thought everyone on the internet was obsessed with that live action movie.