TO MAKE PALEO: simply leave out the cheese and use a paleo-friendly cooked bacon or sausage.
TO MAKE DAIRY FREE: Leave out the cheese.
Skip the sausage, and add in veggies of choice. My favorites are red bell pepper, broccoli, green bell pepper, onion, spinach or tomato! If you want to add veggies, I recommend dicing them up and sauteing in a little olive oil first. Allow them to cool a bit before mixing them in with your eggs (otherwise they'll cook your eggs!)