Pets are nice little fluff additions to the station that I think a lot of us really treasure. Who doesn't love Ian? He gets all my hats. I'd snuggle the silly snake. Runtime is the cutest cat. The RD's pet may be in a glass case but still is just as good.
I'd like to suggest adding a pet for the captain and HoS at the least. Re-adding Steve the Diona Nymph would be nice, too, since we seem to have lost him and I'm not sure if that's an intentional thing or just is a thing now.
I don't know what they'd get, but just please, anything but parrots.