Fun Fact :
I actually consider my first fandom to be Warrior Cats, (The book series).
It was the first thing I was ever truly "obsessed" with, and it was how I got introduced to other fandoms like My Little Pony. I started making fanfictions and fan videos about it, and to this day I'm still a pretty huge fan of those books.
If you haven't read them, I highly recommend them to you.  
And if you have, who's your favorite cat?
I like Ashfur or Oakheart. I'm weird.