The don't ask don't tell is the only way I see to compromise on a very divisive issue.
But
Personaly I would prefer to know if someone I was sharing close quarters with was gay. For me that would make for a more comfortable situation.
Sometimes after you've been serving together you'll know anyway without asking or telling.
Knowing wouldn't change much.
I might be more circumspect to avoid offending or misleading a buddy who was gay.
Idealy Gays should be able to express their sexual orientation in the same way I can express mine.
Not as a flaunting flamboyant exhibition but more like the ways that straight people can be open.
Guys don't have to hide their girlfriends, or their pictures, etc. it would just be one more thing you know about another soldier, like where you come from.
I never once saw an incident in the Army over someone being gay.
However I can imagine openly gay behavior in the close quarters of a barracks or in the field might cause tension.
A problem the military doesn't need
Perhaps this is more of a problem for the Air Force and the Navy
I did see quite a bit of hetero misbehavior some of it quite serious.
Problems with gays would most likely originate from the same guys.