I'd buy the stress bit. We shift workers have to deal with things geared to everyone working daytime hours. Interest groups, hobby clubs, Book discussion groups, and other things of interest that make life fulfilling tend to meet during the evening. I'm lucky that my book group meets in the morning and my Y excersize class class does also. I used to like second shift, but now I wish I could find a job that paid as well so I could change. Also, it is next to imposible to build friendships when you are working evenings.