Personally, I love the Demiguise. 

Personally, I like occamys, but nifflers are a close second, the babies are just too cute

bowtruckle is babey

Bowtruckle hands down

I like a lot of the different creatures in the franchise, but I'd have to pick the Nifflers because everything about them is freaking adorable! Even their name is cute!

Anyone who thinks house elves are creatures is a monster.

A Ghoul

I can't choose skskks

My favorites are Thunderbirds but second favorites are Dragons.