In the 90's, I have been active in underground efforts to lift the military ban. Liberal politics now offer little to gay people. It is better to re-examine moral issues from the position of holding every individual accountability for himself or herself. My own personal story will show this. The world is still a dangerous place.
History shows that personal liberty has been circumscribed by society's ability to afford it.
Today, however, society cannot afford not to have it. The military ban debate today bears a curious parallel to the debate over the draft and deferments during the Vietnam era. Selective Service is still alive and still can exert a subtle effect on other policy areas. Gays can serve without harming unit cohesion. Nevertheless, DADT is probably constitutional according to existing precedents.