Of the mammals, I like hyenas (females are dominant!), gorillas, sloths, guinea pigs, comberson's dolphins (they're small and black and white), rhinos, and platypus
Of reptiles, I like chameleons, geckos, and pretty much all turtles
I love parrots and birds of prey, especially owls
I also like sharks, octopi, and sea slugs
I like all amphibians, but tree frogs really stand out
So yeah, I don't really have a favorite, I like a lot :D