Yup, I talk to my sims. Usually it's to tell them that they're being dumb.
"Stop pillow fighting with your imaginary friend in the kid's bedroom, grandpa! He needs to sleep!"
"Your wife is a light sleeper, can't you take that conversation with your imaginary friend elsewhere?"
(Yes, this sim and his imaginary friend are a consistent problem!)
"No, you can't play in the sprinklers! You're starving and overtired. Go to bed!"
"Tend your garden, and then you can play in the sprinklers!"
"Stop walking around the house in your bathing suit, grandma!"