A&W is my favorite in Canada. Expensive though, but so is everything including McDonald's these days. McDs isn't too bad. But I the last time I had BK or Tim's were so disappointing I just refuse to eat there at all anymore.
Quesada is pretty good for Mexican, we don't have many Taco Bells around here. I don't know if it counts as fast food though, prices are more in the tier of Thai Express and whatnot.