You want to be yourself, yes.. however, most of the bros I fly with hate shaving. We welcomed the opportunity NOT to shave when I was flying EAPs in the AOR. If I was part of your hiring board, I would probably constantly think and/or wonder why you couldn't shave for the interview while other members ask you questions. Was it because you lack the common knowledge that most folks in the conventional military have to shave? do you care more about your personal looks and you prettttty little beard than the job your currently applying for? While asking myself all of the above questions, my thoughts would eventually change to something along the lines of "damn... this dude has an awesome beard... and I had shave this morning while on my way to drill in the car because I was too lazy to wake up early to shave in the bathroom". Either way, due to the numerous thoughts and questions that might be running thru my head, it would most certainly pull me away from the fact that you might be God's gift to aviation (on paper...) Now it will be pretty stupid to NOT select a solid competitive candidate over a beard. Unfortunately in the military, we might find ourselves doing things are are pretty STUPID more often than none. Its a love hate relationship.
Shave the beard, be a cool bro on your next interview, don't be a tool and show them you would be the perfect fit for the squadron.