First I'll vote for Ron Paul regardless of who gets the nomination and even if that vote has to be a write in vote.
All I want to say about the "I went" comment is that someone is going to challenge this by saying "well if you had to be drafted you had very little choice but to go." When Ron was drafted it was well out in front of Vietnam when people were going to Canada and otherwise doing their best to avoid service and I don't think we were in a shooting war during that period either.
Not to in any way diminish the fact that he served our country or that it's a very big plus. During Vietnam, which I think would have been the Gingrich time frame, there were a multitude of ways you could avoid the draft. Student deferment was the deferment of choice but alternate ways I remember were conscientious objection, being deemed 4F by physical, being employed in an essential civilian job, being homosexual, being in mission service, even joining the National Guard, Coast Guard were looked on as lesser of evils to avoid the draft. If you were lucky your number didn't get high enough up in the lottery to give many any reason for worry. Gingrich might have even been exempt because of his father serving in Vietnam during the period.
I'm not sure but Dr. Paul might have been able to request a deferment simply based on his occupation or even the fact that he was married and had two children. I don't think the typical voter has any idea. The important thing is that he accepted the responsibility to serve his country and did not attempt to get any form of exemption.
Many tried to limit their exposure to the potential to have to serve "in country" during the Vietnam conflict by volunteering immediately for the Air Force when they would get their draft notice. I had signed up and taken all the tests before I graduated from HS in may of 1966 but had to wait until the following February of 1967 before I could finally get in. The AF was doing all they could to help the guys out who were being drafted by pulling them in before their Army reporting dates if they could pass the exams. Many Airmen served in country of course but compared to duty of the typical Soldier or Marine it was desirable duty for the enlisted personnel if you had to go.