Within the category of fast food specifically, I give Wendy's 5. I have lived outside the country for almost 10 years, and the ne style of Wendy's compared to what it was when I left is ultra modern and hip. A big improvement.
The food is much better too. The meat is fresher than most other places and seems more flavorful. I also like the new flavor a of frosties. I do wish that used better cheese. I really hate that thin processed cheese, and would really enjoy some real cheese.
Also, they cook their bacon well and thoroughly. Many other places give my stomach severe issues when I eat their bacon, but Wendy's is fine.