You just are, honey. I don't know what to tell you. Move beyond thinking you're just an average dad.
For the way you love them, and me...for the way you play with them...for the way you lift up, and support, and encourage them...for all you do for them whether you feel like it or not...for the way you get down and play with them, and the way you snuggle them at night, and smooch them in the morning...for all those things and infinitely more, I am so grateful that you are their dad. So are they. Even when they say they "only want Mommy", know that they adore you as well, and love you deeply and passionately. And they're not alone.
Happy Father's Day, honey.