Again it's a biased situation.
Dogs are neat, I own dogs and have most of my life, she's practically a dog with a fuck ton of humanity without giving up everything to just be a human in animal clothing as far as /co/ has worked her.
Sibella is pretty neat, seems high maintenance, and as much as I'm sure I'd get a kick out of that life adventure I'd probably bash my head against a wall at some point from her tomfoolery, but who knows.
My other options:
A phantom who may or may not be able to physically interact with me but she's cute as a goddamn button.
A mummy who even in the redesigns still looks like a child, and that whole paper skin and dusty innards thing is grossing me out a bit.
Elsa, who is probably a pretty great person except for the fact that at some point things are going to fall off of her and I can't promise you I'd be okay with that.
To each their own, it's YOUR CHOICE who you like, it's just Winnie hits a lot closer to home on what I'm okay with and what I'd enjoy.