+1000
Disclaimer: I did not get hired, so read this at your own risk. I can't help you with what to do, but I think I can help you and others with what not to do.
I had a couple interviews with fighter boards, and I would consider myself (humbly) to be a pretty above average and well rounded applicant. And I failed miserably, for real likely the worst interview at the board. I failed because I was stubborn and could not detect/recognize what they were really looking for, and for some additional external reasons out of my control (life isn't fair, but you gotta keep picking yourself up). I came from a place where I had to punch for the high GPA and high academic scores while in college earning dual engineering majors. So that is what I did, at the expense of a lot of fun, but in the end it earned me a job that allowed to pay for most of my civilian ratings. And it took a lot of effort and energy. I would go to interviews/visits and my academic achievement seemed to be unimportant to the board, and it made me really grumpy. Another similar applicant got feedback from his home unit (he was E at the unit), that he wasn't doing anything to really try and become a pilot when he had just finished his electrical engineering degree, and I could sense how grumpy that made him. So if you are someone who busted ass academically, you are going to have to put your thick skin and blinders on. IMO, as brabus said the interview is the most critical component because they don't know you, and unfortunately if you have high grades it seems there is a tendency for people to maybe make some "assumptions" about you (maybe this is justified, stereotypes exists for a reason I guess). You KNOW YOU, they don't, the interview is the only tool they have to see if you'll fit so have some empathy for the board too. The interview is a POPULARITY contest....NOT a capability contest. Read that sentence twice. Anyone who has gotten the interview has likely already been branded capable. Be prepared, be yourself, be happy, be POSITIVE, and prove you will be a GOOD TEAMMATE. They are people just like you, don't geek out with your tail between your legs because of all the green flight suits. If i could do it all over again, I would have treated it like taking a girl out instead of an interrogation in the the school detention office. You might only get ONE chance, so make sure she has fun and knows that you'll be good in the sack later on. With COVID my guard run is likely finished due to age (27, I am fighter at all costs). I spent 35K turning myself into a commercial multi engine pilot, when all I probably had to do was spend a grand or two on at an interview consultant and maybe I would have that fighter slot. Now I am sitting here preparing to pull the pin on active duty so I can have a chance to still go upside down and sling weapons...don't be me lol.