In a large bowl, mash one avocado with the lime juice, salt, and pepper until creamy.
Add the chicken, red onion, corn, cilantro, and any optional add-ins.
Gently fold in the second avocado (diced) so you get some creamy bits and some chunky bites.
Taste and adjust seasoning. Serve chilled or at room temperature, on its own, in lettuce cups, or piled onto your favorite bread!