Preheat your oven to 375°F. Lightly grease a 9x13-inch baking dish with non-stick spray, then spread about 1 cup of enchilada sauce across the bottom.
In a medium bowl, stir together the shredded chicken, softened cream cheese, green chilis, and 2 cups of the cheddar cheese. Mix until everything is creamy and well combined.
Spoon about ½ cup of the chicken filling into the center of each tortilla. Roll them up snugly and place seam-side down in the baking dish. Repeat with all 8 tortillas.
Pour the rest of the enchilada sauce evenly over the rolled tortillas, then sprinkle the remaining 1 cup of cheddar cheese on top.
Bake uncovered for about 30 minutes, until the enchiladas are warmed through and the cheese is melted and golden.
Pull them out of the oven, let them cool for a few minutes, then top with sour cream, salsa, fresh tomatoes, and sliced avocado (or let everyone top their own at the table).
Serve warm, and enjoy every cheesy, saucy bite!