It's an animated series that started airing on 2010, it's animation, plot, good voice acting, uniqueness and cuteness attracts from kids to adults and it's pretty popular in pop culture. The "deal" with that is that it is a good animated show and it's easy to enjoy, that's it.
So... there is still a My little pony show on? I haven't seen anything like it here in the Netherlands for ages, yeah yeah, I'm getting old (33), that might be the problem too... just checked an episode on YT (S01E01)... not really my cup of tea... considering the show itself, your fanart is right on the money! Good job!
Yes! It's a neverending trend, it seems. I've been a fan since I was little, but this show is the best out of all MLP shows. Thank you! And I recommend watching the first episode of the second season, it's amazing.