Dragon Ball Z both introduced me to anime and made me hate it. There was two reasons for that, one is not really DBZ's fault, rather Toonami's fault. When Toonami was airing DBZ I remember they were airing like one saga, then reset to the start, then go through to the next, etc. So they'd start with Saiyan Saga, then start over and do the Saiyan Saga and Namek Saga, then start over and do the Saiyan, Namek, and Frieza Sagas. That shit annoyed me to no end.
The second thing was that shit took forever in DBZ. Very specifically it was the fight with Goku and Frieza. That shit went on way too goddamn long. It especially pissed me off when the narrator dude said something like the planet is supposed to blow up in ten minutes and a whole episode goes by and they're still fighting. I mostly stopped watching DBZ after that. Only bits and pieces, mostly in the Saiyaman/World Tournament stuff and nothing beyond that. That largely pushed me into think anime being dumb shit for losers.
Fast forward like a decade-plus. I was reading websites for E3 news and saw a little throwaway story about World of Tanks announcing some cross-promotion with an anime called "Girls Und Panzer." I thought it was an incredibly dumb thing, but dumb in a way I could kind of appreciate. I caught a couple of clips on YouTube, and soon enough signed up for a trial account with Crunchyroll and ultimately fell down a deep, dark, moe-shaped whole to which I may never climb out of. To this day, though, I can't really watch any sort of long-running shonen series and any sort of protracted fight sequence absolutely bores me to tears.