For some men muscle development is such a complete preoccupation that they will miss important events, continue training through pain or broken bones, even lose their job rather than interrupt their physical development schedule. Curiously, these same men are not in love with their bodies. Despite a well developed physique they are unlikely to show it off and will shy away from situations that expose their bodies. http://menshealth.about.com/cs/menonly/a/bigorexia.htm
Then you have 'bigorexia' which some refer to as 'reverse anorexia'.....The main characteristic of bigorexia is the thought that no matter how hard you try your body is never muscular enough. We've spent so much time, energy and resources focusing on women's body image issues, we've neglected paying attention to the men who suffer similar maladjustment trying to conform to some arbitrary standard of "masculine" perfection.
For others "too big" can also signal abuse of steroids and an excessive burden on the heart muscles to pump blood to all that excess musculature. People come to the gym with all sorts of "issues" that are never addressed since gyms are basically there to make money, not to counsel or mentor (unless you're a competitive body builder).