We've had quite a few. When I was little we had a pet turtle (briefly), a pet duckling (also briefly - one of my sisters dropped it) plus a few cats and dogs.
More recently two dogs - a labrador and an Australian cattle dog cross. (both gone now) My wife has another labrador. They weren't really my dogs - I bought them for my son and they were totally obsessed with my wife - she has a natural affinity with animals, it's incredible.
If I had a house instead of this flat I'd get 2 labs or maybe 2 Golden Retrievers.