I think it was through Dragon Ball Z back on Toonami in the early 2000s. My brothers and I would always watch it every day after school. But I was definitely a very casual anime fan for most of that decade only getting into other mainstream anime like Naruto, One Piece, and Yu Yu Hakusho. I started watching a few anime "classics" around 2011 or 2012 with the likes of Full Metal Alchemist: Brotherhood, Cowboy Bebop, and Mobile Suit Gundam. But it was only in 2013 with Kill la Kill that I really got into a variety of anime, and ever since I got a Crunchyroll account in 2016, I've been watching quite a bit at any given time.