For some.... A deal breaker could be a certain number of kids, a lifestyle choice, or something as simple as a gold tooth. Penis size is a factor for some. Even the choice of hairstyle. For instance some men don't like natural hair on women.... (I've been asked to straighten my hair by a guy before). Also if a woman wears a weave, that can be a deal breaker for some men.
So why is it that people will let a potentially great person pass them by because of one thing that they see as a deal breaker.
For a male friend of mine, his issue with a female he met was the number of kids she had. (Especially if she had never been married and had an excessive number of kids). He would talk to or not talk to a woman according to the number of kids she had. He never considered the great woman factor. Her kid count was a deal breaker for him regardless if she was a great woman.
A deal breaker of mine is bad breath! If your breath is horrible....that is a "not going to happen" factor in my book. But maybe, just maybe I should consider something like.... "Did you just eat lunch?"as a possible factor to the bad breath. But if we continue to meet and Im still making acquaintances with the same horrible breath-that is a deal breaker for me.