I just got sponsored...
...by a C-141 unit. (I had been to 2 other UTAs before (2 other units) but they were just "face time" visits and not really interviews. )
When I went for the actual interview, there were 2 local guys with me. One was a crew chief in a nearby guard unit. He had neither scores nor physical done but was an aviation major in college. The other was a commuter pilot with plenty of flight time, scores but no physical. Frankly, I wouldn't mind going to OTS and UPT with either of them.
I'm an engineer, 300+ hrs, had scores (80s or better), had taken the physical and was waiting on a waiver request.
(I was
not local....and had traveled 2500 miles at my own expense because after working 2 years to get this far I was willing to go anywhere!).
The best advice I can offer to to just be yourself.
I was always a bit aprehensive that perhaps I came off as a bit shy. I knew that I wasn't shy and that when I was comfortable , the conversation would just flow. (sounds like dating advice

) I just told myself, "Oh well, there's nothing I can do about that." A good night's sleep was also essential.
The next day went great. Everyone was easy to talk to and I really felt I could be at home there. I took that attitude into my interviews and walked away that afternoon with sponsorship.
Be comfortably honest. Although all the officers that interviewed me were airline pilots, I told them flat out that I was there beacuse I really wasn't impressed by airline flying as much as I was by flying full time in the military or part time in the military and doing something a bit more intellectually stimulating than airline flying on the civilian side.
Afterwards, the XO told me that they liked the way I spoke up without being cocky about it. I believe it's called being aggressively humble.
One more thing. Chances are, they're probably going to ask you who wants to go first. Don't go first!
I remember hearing that in aerobatic competitions, the competitors dread going first because no matter how well they fly, their performances won't be remembered as well as those who flew near the end of competition. Be tactful about it, INVITE the other people with you to go ahead.... and then get feedback from them when they return!
Andrew