Do you think its easier to photograph celebrities, babies or non moving objects?

In my opinion, babies have been the most challenging but also one of the most rewarding to photograph. I’ve had to deal with popular personalities and for the most part they know what to do, you just have to connect with them and be professional but a baby could care less who you are what you’re there to do. So, I realized that they are easiest to handle when they are asleep. I once ran into a book called “Sleeping Beauties” it is really dope, I recommend all you parents out there to take alook and envision your baby in those poses. One of the tricks to keeping them asleep is to keep a portable heater close to the baby at all times. However, the heater will not prevent occasional golden showers from the infant but it will definitely help out alot. Which do you think is most challenging to shoot?