I really like McDonalds in France, much better than in the US.
I would say KFC is better in USA though. Here, they don't have mashed potatoes or coleslaw, and the bread for sandwiches is pretty bad. Plus in the US they've got the Double Down!
Here We've also got Quick. It's kinda like a french McDonalds. It's alright, but not as good as McD.
I also like Subway. Usually get The Chicken or Subway club w/honey mustard sauce. I like the Meatball Marinara too but it always becomes a mess.
Next to our house, we've got a fast food called "K-pital". Those guys serve burgers with like 3 slices of cheese and 1 pound of beef along with some other crazy sandwiches like one with two steaks, two breaded filets and chicken inside. Poor waistlines...