We always imagine that if humans had tails they'd be furry tails but they'd actually probably be hairless like our bodies

It's like a necktie for your butt! I'd take it over flat-butt.

I've got some furry friends and there's a whole spectrum. You can run into everything from the mostly human with some animal features like the kemonomimi trope to full anthropomorphic animals. Depends on the person really.