I forever love thinking about this question, but I still feel like I can never come to a conclusion for my kitty lol he's probably somewhere between Gryffindor and Ravenclaw. This animal taught himself to jump up different ways to use the door knob so he could let himself outside to go potty (litterbox is unacceptable to him) which suggests creativity akin to Ravenclaw to me. But then the rest of his personality is very Gryffindor-esque.

He's definitely not the cunning of a Slytherin or the friendliness of a Hufflepuff