Mine is dog. They are very loyal and always help their master without any requirement. Even you died, they always wait for meeting you . I used to raise some, but they die or captured, so I was sad so much....
Personally I have always loved having dogs. Since early childhood I've always had dogs running around the house. They are typically friendly and also are good at protecting the house. My favorite breeds would be German Shepherds, Boston Terriers and Labradors.
I really love birds. I have 8 birds in my house and one of them even killed my fish .
Sometimes I just can sit back and watch them and hear them sing for hours