Something else about QSFB that might be important, especially for the girls...there are very strict fingernail and jewelry policies for anyone working in QSFB as well as merch locations that sell food that must be handled (fudge, cupcakes, etc). In addition, tattoos that are visible on hands/forearms are not permitted AT ALL as these locations do not permit the use of makeup on hands/forearms. I was surprised to learn that Chester & Hester's in Dinoland was one of those random shops that was merch, but carried fudge and cupcakes, so foodhandling was part of the training. Just something to bear in mind when considering roles.
I wanted the CP badly, VERY badly. Already signed a lease badly, HOWEVER, I was not willing to put down certain roles, including QSFB, custodial, and housekeeping (among others). When asked, I was very specific about NOT being interested in those areas as I felt my prior experience better prepared me for the roles I had checked off. I also knew that my chances of QSFB increased exponentially if I checked it.
Please don't be so desperate to do the program that you'll settle for just anything. Being miserable takes all the magic out of it. If you think, however, that you have the personality type that can make the most out of any situation, then by all means, check all the roles and hope for the best.