Hands down, retics. I love my boas and they do all have their own personalities but none are as pronounced as Caesar my retic. He pushes the door when he wants it open so he can hang out. When i pet him, he will literally put his head on my arm or lay his head next to my arm lol. If i boop him on the head, he will lay down right where he is like a scolded dog. Never seen a snake do that before. And when he gets cranky or i 'tickle' him and he isnt in the mood, he will push my hand away with his body. If i keep bugging him, he looks at me and then wanders to the closed door side of the cage haha.