Quirky, odd, funny icks

Been seeing too many negative posts so wanted to post something we can laugh at each other for.

What is a tiny, inconsequential characteristic which if you see in your potential partner will give you the ick and make you want to reconsider taking this further? Think Seinfeld level reasons for rejection.

Mine are: Pronouncing 'sh' sound as 's' or posting Instagram stories with a song attached to it.