The Correct Answer to this poll is Chik-fil-A.
KFC, Zaxby's, and Popeyes destroy the chicken by over-spicing it. Popeye's and Zaxby's then add insult to injury by drying it out too much. Their restaurants are dirtier, their staff less helpful. Additionally, they try for a greater variety of sides, but the sides actually suck - the mashed potatoes are to regular instant mashed potatoes what instant mashed potatoes are to
actual potatoes.
The Chik-fil-A sandwhich, however, forms the basis of the perfect meal. Simple, balanced, but juicy, delicious, and hot. The variations (the grilled, the club) expand upon, rather than overriding the quality of the original. The salads are well-made, with fresh ingredients, and are delicious. The restaurant is clean, the background music soothing, and the service is fantastic, which is why
Chik-fil-A has the highest customer satisfaction ratings of any fast food restaurant.
Chik-fil-A sauce is additionally the perfect condiment for meals featuring a wide variety of meats extending well beyond the chicken milieu (though that is where it agreeably shines). It adds a sweetness and juiciness to ham, turkey, sausage, and additionally serves as a preferable salad dressing for those predisposed to enjoy the honey mustard option.
Other fast food restaurants sometimes put toys in their kids meals. Chik-fil-A puts in books. Chik-fil-A offers free deserts to families if they agree not to use any electronic devices during the meal, because Chik-fil-A values its' customers' emotional needs as well as their physical ones. Chik-fil-A can cater a party or meeting on short notice in an emergency with a delicious variety of finger food, full meals, or snacks and deserts. Or, if you are stranded in a snowstorm,
Chik-fil-A will feed you for free, because Chik-fil-A is about service.
Chik-fil-A is far and away the best - if not the perfect - fast food restaurant, dealing in the most delicious chicken. To put other, sadder, dirtier, lesser fast food joints next to it is not so much an insult, as it is to unfortunately take them out of their category and attempt to place them where they do not belong.