Well my wife is a biologist and I love animals so it goes. Right now we dont have much, just a cat, an aquarium with about 20 fish in it, another aquarium with the mudskippers, and a snake.
In the blueprints for our house though that we are going to build we have a reptile room in it that is going ot have terrariums built into the wall with snakes and stuff and then throughout the house there will be aquariums and terrariums.