My introduction to MLP was shitty greentext readings and pony animations on youtube that I watched on my mom's laptop
I had only watched like 8-10 full episodes by the time I first decided to use 4chan (and 1 day after, /mlp/). Then I watched the first 2 seasons on my own before watching the entire thing during the 2020 anniversary stream
The only episode I remember disliking was Castle Mane-ia and the ones I liked the best were The Cutie Mark Chronicles and May The Best Pet Win, especially their songs