I like macaroni and cheese
Me too! I assume you are either American or Canadian as they call it mac and cheese while Caribbean English calls in macaroni pie.
Am Canadian. That is true
Same here. Do you like to add other ingredients like breadcrumbs, meat and veges? 
I like to add shredded Chicken and veges 
What about cooking method? I like to bake it in an oven as opposed to cooking it in  a sauce pan on a stove.
Same here
In the States, it is highly acknowledged as comfort food. What do you think?
Really? 
Yup, comfort food provides a sentimental value to an individual so maybe people grew up loving and eating it?