Girls, what is a feature of person that's a "red flag" or "showstopper" you won't ignore? What will end the relationship before it starts?

You meet a guy, but something's off about him. What's the worst thing it could be? Is it something on the list, or something unlisted that bothered you more than what's on the list?

Also:
Why does it bother you?
Have you dated someone with this feature before?
Did it ruin the relationship, or was it something else but you won't forget this feature either?
If all other features were good or perfect, would you overlook this one and date him anyway?

This is a conversation. Whatever comes to mind. Comments, experiences, etc. I'm interested in hearing it all.

Weight (skinny, overweight, weak, too muscular)
Hair (too long, balding, hair color)
Height (too short, too tall)
Teeth (crooked, missing, dentures)
Hygiene (body odor, breath, clothing smells or is unkept, nails, hair maintenance)
Personality or Opinions (too passive or aggressive, bad political, social or ecological takes, religious or irreligious)
Money (too little, is there such thing as too much?)
Select gender and age to cast your vote:
Girls, what is a feature of person that's a "red flag" or "showstopper" you won't ignore? What will end the relationship before it starts?
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