First time watching was about a year ago, and I could barely get past the opening titles. I guess I was still prejudiced towards my image of My Little Pony from the 90s. So when I sat down to watch episode 1:01 in August, I skipped past the opening titles and just watched the episode. With a filter of disbelief. But then the plot thickened when Nightmare Moon appeared rather than her elder sister. And that drove me to start up the next episode.
By the end of episode 2, I was thinking "Hey, this ain't half bad". And so I started the next episode. And the next. And the next. And by the end of the week, I was in full brony mode.