Millennial tastes are shaping the future of fast food, and majorly impacting longstanding brands. But what chains are keeping them happy now? YouGov BrandIndex ranked the restaurant chains that 18-33-year-olds would consider going to again to gauge their current brand loyalty. Gourmet sandwich chain Jimmy John’s topped the list, with 83% saying they would return. Chipotle, Chick-fil-A, Whataburger, and Subway made up the rest of the top five, in that order. (Business Insider)