If you want to prepare the dish in advance, place the creamy pasta in the baking dishes but only bake 30 minutes before you're ready to serve. (If you store the pasta in the refrigerator before baking, make sure the pasta is warm; maybe bake for a longer time, 15-20 minutes).
I used a wide variety of cheeses; you could use other cheeses such as goat cheese, Monterey Jack, Gruyère or Munster.
To make white sauce, I always start with all the ingredients at the same temperature, so make sure to heat the milk in the microwave for about 2 minutes (or in a saucepan), so it's warm. If you get lumpy pieces in the sauce, don't hesitate to use a hand blender.