And whatever you do, never let it be known you are considering any path other than CNO or bust before the end of your first fleet tour. And by end, I mean you are on your way to shore duty with a signed FITREP in hand.
For the young'uns out there, this ^^^ certainly comes across as cynical. It's also
good advice.
When it comes to fitreps, the CO only has so much love to give out. Good COs take pride in rewarding good people- say your CO has two people who have done a lot of hard work, one of whom wants to take the aviation "golden career path" (JO, FRS, dissoc/super JO, DH OPS/MO, joint, XO/CO) while the other expresses, ahem, ambivalence to that path, and interest in trying something that is different and uncertain, then... There are also some COs out there who, when a young officer doesn't want to follow in their footsteps and become
exactly like them, seem to get confused or almost take personal offense (admittedly, he/she worked his ass off to get to that position, and we should respect our elders, even the ones who may be a little narrow-minded). You'll work for both kinds.
The notion that everyone should
literally be on track to be CNO (or Commandant, COS, etc.) is
absurd, but try to think of it as an
abstract concept instead of taking it literally. That means everybody is supposed to do as best as they can ("documented sustained superior performance...") so that they can earn a tough set of orders for their next tour ("...in critical/tough/challenging/operational/etc. billets"), and lather, rinse, repeat. That's your
detailer's starting position when you are negotiating orders because that is his
job. The catch is that a lot of good deals that
aren't on the golden career path
also need decent fitreps. If you're interested in taking a different path, unfortunately then that puts a lot of onus on you to figure out when/to whom/how to talk about it.
That doesn't mean you need to play a charade and act like a kool-aid drinkin' company man at your every waking moment, it just means to use your common sense.