I always had pets in my family, since I was a child, in the house of my mom, we have 4 dogs (we rescued 2 of them from the street) 3 cats, all of them are also family, I know the love they give and expect to recive. 
I like to walk with them, play games and make them feel comfortable. 
In my instagram 'franco paganoni' you can see a lot of pictures of my pets and myself with them. 
I had my first pet sitter experience with a dog of my friend, when he had his holidays and I lived in his house a week, with his dog 'Limon', was really funny because he was a crazy dog.
So that is why I want to be a pet sitter. I can't have pet in my apartment, but I can go with them to walk or take care them in they own house.