beige flag
neutral
the one-line answer
A neutral or slightly weird quirk that is not a problem but is notable.
Beige flag is the neutral middle between red and green. Not alarming. Not reassuring. Just a quirk that makes you go hmm.
mainstream
Your coworker might use this word.
01 / in the wild
hear it move.
dating
he said he eats cereal with water. beige flag but I'll allow it.
That quirk is strange but not a dealbreaker.