I judge most fast food restaurants on service and I have always found that I get good service at Burger King. It must be part of their corporate training program. Oh, and the burgers aren't bad either. That's my view on it.
The burger and fries at Burger King are the best, in my opinion. I like that they accept special orders. And the service is usually pretty good. All in all, it is usually a good experience when I go there.
I like Wendy's because they seem to have good management and friendly people who work the drive thru or the front counter. The burgers are pretty darn tasy too. Much better than other fast food joints.