Because when its good, and I mean everything is correct... its fucking amazing.
Last time I got Kentucky it was all perfect. The bun was fresh, the lettuce was fresh, just the right amount of mayo, the chicken was hot and crunchy. The chips were hot, fresh and had just too much enough salt and the pepsi was just a shade away from being frozen. It was the best chicken burger I've had in recent memory.
Now, this was an isolated incident. Normally I wind up slightly disappointed in something. But when its right...