What a topic! For myself, an animal was my entrance to Zoo, but there are a number of characters in that time since that have tickled my imagination's ivory key with the skill necessary to reduce me to a quivering mess of flesh that only vaguely resembles a humanoid creature.
Okay, maybe a little bit dramatic but you get my point. Anyways, here are a couple of my favorites.

Ms. Judy Hopps. I was instantly smitten with her, instantly and what appears to be irrevocably. This isn't the best picture but I was having a hell of a time finding any good images for some reason. I also did this very quick .

These two...I simply don't have the words.
I thought about many others, but for the most part I kept coming back to these three. There are a few others in the MLP fandom, specifically Twilight Sparkle, Fluttershy, and Applejack, that I really like as well, but these two were my first. Rainbow Dash just has that cool factor. She's willing to take risks to get things done. She believes in herself and that's an amazingly attractive quality. And Pinkie Pie is just such an adorable character, flighty but always with the best of intentions.

As a former MTG player, I LOVE these mock-ups. And look!


I found Fluttershy and Applejack too! These make me very happy.
And then of course there was Lola Bunny, from the original Space Jam. When I watched that movie after my spud sprouted, well I guess you could say my spud sprouted again lol.