I have liked My Little Pony since I was a wee little girl and watched the original 80s version. It was one of the very, very few stereotypically girly things I ever liked. Probably because there were a lot of evil monsters and some really catchy songs.

When it first started to show up at 4chan, I thought it was odd, but appreciated the art style of it. I picked a random episode to watch (Feeling Pinkie Keen, which had just aired and so was the first one I could find), and thought it was cute, but I still didn't get how anyone could turn it into an obsession so I mostly forgot about it, and trolled bronies as I came across them because I just like trolling in general.

Finally Hux watched it and really fell in love with it so I promptly decided to give it another shot. This time it grew on me quickly and here I am!

Edit: Pretty sure my brother was the original brony; he had a MLP themed birthday party when he turned five, which would've been in... 1991.