hmm, I guess the individual franchise owner makes a bigger difference than I thought.
In-and-Out: I ate at two of them, in the Long Beach CA area. I thought they were both very good. Caloric and cholesterol bombs for sure, but tasty. Fries at both places were very good.
Five Guys: I ate a few of them too. One in NYC, the other in upstate NY . Very good too, similar bombs as in-and-Out, but not quite as good as In-and-out. And the fries at both locations, I thought were good, and the portions were huge.
McDonald's - I've been to too many to count but they were consistently subpar (except for their fries, which are good) On the Plus side I have yet to see any whip marks on the meat where the jockey hit it.
KFC I agree, pretty good a loooooong time ago, not any more. Perhaps they need to finally change the grease they use....
Chick Fil-A. I went to one recently with a friend who swears by them. While I did not swear while there. I thought the food was on the bland side. Ok, but not great, and not awful
Taco Bell. I've never had a good experience with their food. Every visit was almost always combined with a lengthy, stinky, ozone layer depleting, double courtesy flush, explosive power dump. Though looking back, I think there's some value to Taco Bell as prep for a colonoscopy. More effective than any laxative.
Sbarro. I've eaten their pizza few times. Around here they're located mostly along highway rest stops. doughy and overpriced but not dreadful. Sad to say, if located beside a Taco Bell and McDonalds I might still gravitate toward it.