I find large or ugly noses very unattractive. His teeth also need to be really nice. The only physical characteristics that I find repulsive on women are plastic surgery and any extreme body type brought about by a lust for perfection. Fake breasts and anorexia turn me off. Women should be proud of their imperfections because that is what makes each person unique.
Smoking is repulsive.
It smells bad, it makes clothes smell bad, it's just gross. And it's bad for both people's health. The smell of sweat is great when you both work it up together having sex, but to be close to someone who smells like he has played basketball for the past week without a shower is a turn-off. As beauty is in the eye of the beholder, so is ugliness. But many people weren't turned-off by things such as pointy noses, gangly legs or square shoulders.