Do most people with Gender Identity Disorder have a deep-seated feeling of being inferior to the sex that they long to be? (i.e. not just being the wrong gender, but also feeling rejected by them?)
This is a far more complicated issue than I have time to address right now. However, I will say this. I don't think so. In fact I know for certain that most people who transition come to understand their situation better than the either/or comparisons you are suggesting. It doesn't take long for a post-op person to understand that although they now look and act very much like the gender they aspired to all their life, to realize that in fact that is as close to being absolutely male or female they will ever get. That does not, however, mean that they are inferior in any way. It is simply a different state of existence and has it's own virtues. People who transition are notorious for fitting back into society quite comfortably without notice. Rejection, unless one makes a special point of declaring one's transsexual status is rarely if ever an issue.