I have an Air Force recruiter in the family. Some of this may be regional. She was a recruiter in a fairly affluent area and it was genuinely hard to get enlisted recruits into the USAF.

The common issues with those that expressed initial interest were:

Parents= I support the troops, but not with my child.

Inability to pass minimal physical fitness standards.

Asvab scores in the "I just randomly penciled in the ovals" range.

Inability to stop getting high long enough to pass a drug test.