Some pizza is better cold. Only like to heat it in a frying pan, it makes the crust a little crispier. Heating in the microwave makes most pizza mushy because of too much cheese and a thick crust. A well made Pizza has a good balance of ingredients.
Sometimes. I kinda like room temp pizza. Rarely have it cold because I never seen the purpose of putting it in the fridge. Just leave it in the box on the stove.