My son, whose Grandfather, father, God-father, uncle and great uncle were all at one time in the Royal Air Force over the past 75 years, wanted at first to also join the RAF. At age 18 he said to me, "Dad, do you mind if I don't join the RAF?" Natural reaction was to say, fine, your choice, "but out of interest, why not, given you've been nurturing these thoughts for a few years?"
"Well, dad, I might have to kill somebody and I'm not sure I could do that".
My first thoughts were 10/10 for honesty and integrity. I then said "Thank goodness you've come to that decision now and not just before joining a squadron that may be involved with that sort of operation."
End result, he went up to Newcastle Uni, joined the Northumbria UAS, had two terrific years flying out of Leeming, including being taught by one of his godfathers' Squadron QFIs and ended up with a 2:1.
It takes all sort . . . . .