So my primary source of information on subjects like this is actual AOs, followed by people who have worked as AOs who are not trying to market themselves.
What they say suggests to me that what I would call an elevator pitch might well help. Basically, you can imagine a reader telling an admissions committee, “OK, I think we should strongly consider this one, because . . . .” And what completes that thought might benefit from being succinct, something easily stated and understood without a lot of explanation or elaboration.
Where I think many people go wrong is in believing that elevator pitch has to be academic in nature, or one-dimensional. Indeed, from what I have seen, AOs might particularly value interesting and uncommon combinations.
So, an elevator pitch could be, “this is a woman interested in engineering with top STEM grades and test scores, but her teachers also say she is one of the most kind, friendly, and helpful students they have ever had.” That is the sort of pitch I think could actually get an applicant admitted to MIT, Stanford, and so on.
Or, “this guy really loves math and Physics, but he was also captain of the LAX team, and on top of that also reads and writes French poetry.” That is also an elevator pitch I think could take you far.
Like others, I am a little cynical about why more paid consultants don’t talk like this. I think a basic issue is lots of parents who might hire them don’t think like this, and have not been guiding their kid’s education and development along these lines. And so if a consultant basically told them, “You have college admissions all wrong, you have not encouraged your kid to develop the right personal characteristics, you have not let them find genuine interests,” and so on, they probably won’t get hired.
Anyway, bottom line is I am confident that AOs for highly selective colleges very much care about personal characteristics and value interesting combinations of academic and non-academic interests. And if your kid is already heading in that direction naturally, I think it is a terrible idea to try to force them into what is ultimately a much narrower and less interesting box, just because non-AOs say that is what AOs secretly want, but refuse–for some unknown reason–to confess in public.