I watched the first two episodes and I still thought it was a little too girlyish. Even for a girly girl like me. The third episode I came to actually like and kept me clicking on the next episode. I also wanted to see more Dash! When I first saw a picture of her I just had to watch the show. :D

After watching the first episode I was hooked!

Before I watched the first episode I was like 'Psh. I'll see what all the fuss is about,'.

Afterwards 'This is amazing! Where's the second epiosde? I need it now!'

I think I became an official Pegasister after two episodes but after one, I really loved the show! The episode was Suited for Success.

The episode I watched was The Cutie Mark Chronicles. I was hooked after I saw filly Fluttershy!

I saw the first episode and fell in love with the characters (I mean in terms of caring about them), and immediatlly (dat spellin') wanted to watch the next episode. And the next. And the next. And I had to admit it, I was a brony.

I saw "The Return of Harmony Part One" and was indecisive, so I watched the second part. That was when I became a pegasister.

i watched the halloween one and the one after that and i loved it

First I saw Suited for Success and right after Green isn't your color I was hooked.

All Episodes

Seriously. I saw the very first half of the pilot in October 2010 and was instantly hooked! Couldn't stop watching each new one from the beginning on. :)

I could say one, but I'll go with two.
I saw Dragonshy, and I really enjoyed it. But after watching it, I had no idea that I'd love the series so much. I had never heard of a brony, so I had no idea that people actually watched this show and were huge fans of it. But as I started watching the series from the first episode on, I fell in love with the characters and soon realized that there were all these adult male fans (which helped me cope with the fact that I was enjoying a thoroughly pink show).
So yeah. That was more than you asked for. XD I talk to much.

I saw Cutie Mark Chronicles and kind of liked it so I watched the first two episodes of season 1 and became hooked! :D

It literally took me half of watching A dog and pony show before I realized the show was awesome and that I should've started at the beginning XD . I then proceeded to watch the whole of season 1 in one night.

I saw the first episode and liked the show, but it took 3 before I admitted to myself that I was a brony.

instant

I was just flipping through channels, and found MLP. I watched it, then I got hooked after 2 episodes.