I'm willing to believe that some specific groups in the military self select for certain traits which would tend to skew the distribution of more/less desirable traits off the average, but for the military as a whole? Same as non-military.
Also, I don't think serving in the military makes one more honorable than someone else, or more honorable than they were before they joined. For instance, I don't think Suz is any less honorable than a member of the military just because she doesn't serve the country in that specific manner. And you'll notice she does have less than admirable military people in her books - the worst being Admiral *ucker. Ostensibly, the *=T, but we all know better. (Andrea, does this violate the no swearing code?)
I heard a quote on a news show last year where a newscaster said that one thing he learned from being in the military is that not everyone in the military is a hero. It stayed with me, but probably because I agree. I read Suz and C.Mann's books in spite of their military heroes, though, not because of it. I had a year in AFROTC and while I met some amazing people in ROTC and the regular Air Force (here's hoping Major Levias is nearing General now), I also met one of the stupidest colonels ever and a lot of people I didn't respect in the slightest. But I could say the same of people in any large group of people.
-Erika