For years, growing up, I always ordered from McDonalds: A #2, no onions, and a Coke with no ice. I think the menu has changed since, but a #2 was two single cheeseburgers. After about 3-4 years of exclusively ordering this, I decided to be "healthier" and switched the Coke to Orange Hi-C. In my head I was doing myself a favor.
Eventually I decided to only eat from Subway, and I still have a soft spot for their food. I've toyed with the idea of working there for free/discount food. I tend to order a footlong Italian/Wheat with turkey, provolone, lettuce, black olives, banana peppers, and either mayo or sweet onion dressing. I'm sort of picky when it comes to food.
In terms of drive-thru fast food chains, I LOVED Arby's Martha's Vineyard Salad. Sadly, they removed this item from their menu. I was devastated. It was hands down the best salad I ever had at fast food. It'd come with dried cranberries, pack of almonds, with raspberry vinaigrette. Some places also put sliced apples in it. Sigh.
When I'm feeling hungry, for unhealthy food, I cannot resist Fazoli's. Drive-thru Italian.... GENIUS. I love the fact that their combo meals are like a hungry person's wet dream. Italian dish with a side of pizza? Genius. That's twice the Italian. Their lasagna is amazing.