What kind of training did you receive in your military background. Pharmacy is physically demanding (which I believe is why a lot of Rx's are not too happy), as are other PA specialties, as a male in shape (assuming) you may be able to also succeed in more demanding specialties, ie orthopedic surgery assistant, surgical assistant etc. I do believe of the 3, dentistry may have a slight edge b/c the tuition of dental is a barrier of entry to many. Also with lasik, technology and PRK will only get better.... I think if you've narrowed down to these 3 though, then it becomes a personal choice. I will say this though, a lot of our youth can't even get through chemII, so, this is a barrier of entry already to many, as is calculus, and I'm not even talking about orgo.
At the end of the day, I'd recommend if you can get accepted to a reputable program, in any field, and can generate references from professionals in that particular field, then you have your answer right there. Reputable schools will admit a certain number of students, who they can take care of. Hence their reputation. It's hard to say without more information, but to be honest, student doctor network is not the ideal place to base much of your decision on. In case you haven't noticed, there are way too many negative folks here. I'd also say that half the people on here will never matriculate into a graduate program, thusly, if you can finish and complete any of the 3, OD, PharmD, or DDS, then you will be fine.
Good luck and HOORAH!!!