It's just a internet fad.
No, it's not a fad. It's people expressing their love for a T.V. show. A show that is still airing.
OP, we have a perfectly good My Little Pony thread, perhaps there would have been the place to go? Regardless, I and many others think it's a great show. As a kid growing up in the 90s, I think My Little Pony is on the same caliber as those cartoons I watched as a kid.