Mine also changed when I regenerated. I think I couldn't eat fish fingers and custard anymore if I tried.
Now that I think of it, there's a planet of fish people in my universe that did have fingers. Not the Hath. The Hath have fingers too, but could walk on land and mixed the best drinks. No, these fish people invited River Song and I to a party and when we got there, they tied us up, dipped us in guacamole, and attempted to roast us over a fire pit. Which is a pretty amazing feat, to have a fire pit under water. This happened on two separate occasions. I introduced them to Clara, later, and at that time, they didn't try to eat us, which made for a better party.
I wonder what sort of life forms this universe has.