In my experience, people with criminal records, even with a waiver, tend to get boarded.
One DUI, with no other alcohol related problems may have been a simple mistake.
Multiple DUIs, underage posession, public intoxication, domestic violence, etc. tend to indicate a pattern, despite the vociferous denials of the individual.
IMHO, we have plenty of problem children already, and do not need to bring more into the force, so people with these histories are usually NTRed. I have seen a lot of good SF soldiers put out of the Army due to a single DUI, even with an otherwise sterling record.
Take a hard look at yourself, and your personal issues, make your choices, and do your best.
"It is not the critic who counts; not the man who points out how the strong man stumbles, or where the doer of deeds could have done them better. The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood; who strives valiantly; who errs, who comes short again and again, because there is no effort without error and shortcoming; but who does actually strive to do the deeds; who knows great enthusiasms, the great devotions; who spends himself in a worthy cause; who at the best knows in the end the triumph of high achievement, and who at the worst, if he fails, at least fails while daring greatly, so that his place shall never be with those cold and timid souls who neither know victory nor defeat." - President Theodore Roosevelt, 1910
De Oppresso Liber 01/20/2017