Don't Bite the Sun by Lee (1979, Paperback)

The first science fiction/fantasy book I read, still remains one of my favorites to this day. The protagonist, never named in this book, strikes back at a dream world where body and sex changes are the norm and robots serve every need, obesity and ugliness and even death have been concerned. What is left to rebel against? Rebellion itself. This is a find-yourself book or a coming of age book set in the far future. A mid-teen and young adult book.